How to install MSI before main EXE and then uninstall this MSI on exit

Hi,

I could not understand docs and could not find examples
how to install MSI file before launching main EXE file.
I should uninstall this MSI on exit.

I don't understand how to make plugins here:
https://portableapps.com/development/portableapps.com_format#plugins

waitforexen - is it my case? But how to uninstall such exe.
https://portableapps.com/manuals/PortableApps.comLauncher/ref/launcher.i...

Thanks!!!