the name says everything.
use at your own risk (it may go wrong, set your pc on fire and kill your cat (even if you don't own one))
Clone the repo in your TemplateVM and run ./setup.sh.
For existing AppVMs you need to run the script in the AppVM and theit TemplateVM.
Set all cpu-counts to 1:
qvm-ls --raw-list|xargs -I % qvm-prevs -s % vcpus 1