diff --git a/fTools.Designer.cs b/fTools.Designer.cs
index 0728e0c..8568046 100644
--- a/fTools.Designer.cs
+++ b/fTools.Designer.cs
@@ -76,6 +76,7 @@ private void InitializeComponent()
             this.grpLineType = new System.Windows.Forms.GroupBox();
             this.rLineTypeSpline = new System.Windows.Forms.RadioButton();
             this.rLineTypeLinear = new System.Windows.Forms.RadioButton();
+            this.chkUnusedOnly = new System.Windows.Forms.CheckBox();
             this.groupBox2.SuspendLayout();
             this.grpCreateThings.SuspendLayout();
             this.panel3.SuspendLayout();
@@ -165,6 +166,7 @@ private void InitializeComponent()
             // 
             // groupBox2
             // 
+            this.groupBox2.Controls.Add(this.chkUnusedOnly);
             this.groupBox2.Controls.Add(this.cmdRetag);
             this.groupBox2.Controls.Add(this.label12);
             this.groupBox2.Controls.Add(this.txtRetagStart);
@@ -579,6 +581,16 @@ private void InitializeComponent()
             this.rLineTypeLinear.Text = "Linear";
             this.rLineTypeLinear.UseVisualStyleBackColor = true;
             // 
+            // chkUnusedOnly
+            // 
+            this.chkUnusedOnly.AutoSize = true;
+            this.chkUnusedOnly.Location = new System.Drawing.Point(137, 12);
+            this.chkUnusedOnly.Name = "chkUnusedOnly";
+            this.chkUnusedOnly.Size = new System.Drawing.Size(135, 17);
+            this.chkUnusedOnly.TabIndex = 3;
+            this.chkUnusedOnly.Text = "Use Only Unused TIDs";
+            this.chkUnusedOnly.UseVisualStyleBackColor = true;
+            // 
             // fTools
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@@ -661,5 +673,6 @@ private void InitializeComponent()
         private System.Windows.Forms.GroupBox grpLineType;
         private System.Windows.Forms.RadioButton rLineTypeSpline;
         private System.Windows.Forms.RadioButton rLineTypeLinear;
+        private System.Windows.Forms.CheckBox chkUnusedOnly;
     }
 }
\ No newline at end of file
diff --git a/fTools.cs b/fTools.cs
index b831a34..556b85a 100644
--- a/fTools.cs
+++ b/fTools.cs
@@ -20,6 +20,8 @@ public fTools(BuilderPlug p) {
 
             chkAdjustAngle.Checked = General.Settings.ReadPluginSetting("adjangle", true);
             chkAdjustPitch.Checked = General.Settings.ReadPluginSetting("adjpitch", true);
+            chkUnusedOnly.Checked = General.Settings.ReadPluginSetting("unusedonly", true);
+
             txtUnitTime.Text = General.Settings.ReadPluginSetting("adjtics", 8).ToString();
             txtUnitLength.Text = General.Settings.ReadPluginSetting("adjlen", 1024).ToString();
             txtCreateType.Text = General.Settings.ReadPluginSetting("thingtype", 1).ToString();
@@ -572,27 +574,75 @@ private void cmdRetag_Click(object sender, EventArgs e) {
                 return;
             }
 
+            if (!chkUnusedOnly.Checked && paths.Count > 1) {
+                MessageBox.Show("You may only have one path selected for retagging, when opting to clobber tids.");
+                return;
+            }
+
+            General.Settings.WritePluginSetting("unusedonly", chkUnusedOnly.Checked);
             General.Map.UndoRedo.CreateUndo("Retag path");
-            foreach (List<PathNode> path in paths) {
-                //filter interpolation points for faster lookup during path processing
-                List<Thing> ip = new List<Thing>();
-                foreach(Thing t in General.Map.Map.Things) {
-                    if (t.Type == 9070)
-                        ip.Add(t);
-                }
 
+            //filter interpolation points for faster lookup during path processing
+            List<Thing> ip = new List<Thing>();
+            List<Thing> ip_specials = new List<Thing>();
+            List<Thing> ip_movers = new List<Thing>();
+            foreach (Thing t in General.Map.Map.Things) {
+                if (t.Type == 9070)
+                    ip.Add(t);
+                if (t.Type == 9075)
+                    ip_specials.Add(t);
+                if (t.Type == 9071)     //path follower
+                    ip_movers.Add(t);
+                if (t.Type == 9072)     //moving camera
+                    ip_movers.Add(t);
+                if (t.Type == 9074)     //actor mover
+                    ip_movers.Add(t);
+            }
+
+            void doretag(List<PathNode> path, int tid, bool unusedonly)
+            {
                 //Retag each node in the path
-                foreach(PathNode node in path) {
+                int i = tid;
+                foreach (PathNode node in path) {
                     int old = node.ID;
-                    newtag = node.ID = GetNextUnusedTag(newtag);
+                    if (unusedonly) {
+                        tid = GetNextUnusedTag(tid);
+                    } else {
+                        tid = i;
+                    }
+                    node.ID = tid;
 
                     //if any ip (anywhere) is pointing to this node, then update it
                     if (old > 0) {
-                        foreach(Thing t in ip) {
-                            if (t.Args[3] == old)
-                                t.Args[3] = newtag;
+                        //Update any ip's pointing to this node
+                        foreach (Thing t in ip) {
+                            if (t.Args[3] == old) {
+                                t.Args[3] = tid;
+                            }
+                        }
+
+                        //Update any assigned ip specials
+                        foreach (Thing t in ip_specials) {
+                            if (t.Tag == old) {
+                                t.Tag = tid;
+                            }
+                        }
+
+                        //Update any assigned ip movers
+                        foreach (Thing t in ip_movers) {
+                            if (t.Args[0] == old) {
+                                t.Args[0] = tid;
+                            }
                         }
                     }
+                    i++;
+                }
+            }
+
+            foreach (List<PathNode> path in paths) {
+                doretag(path, newtag, true);
+                if (!chkUnusedOnly.Checked) {
+                    doretag(path, newtag, false);
                 }
             }