Set PortableApp as default program

After this issue I thought it would be a good idea, to have a PortableApp that could register portable apps so they could be used as default apps

Here is a script that register portablefirefox so it can be set as the default browser
https://www.winhelponline.com/blog/register-firefox-portable-with-defaul...
I ask in that other thread:

Could this type of script be added into the PortableApps Options menus - maybe with options for :
PortableFirefox
PortableThunderbird
PortableSumatra
PortableLibreOffice
et al
maybe scan installed portableapps and offer suitable ones that could be registered

Or could somone make it as a PortableApp

That would be really usefull to many I think - I'd give another Donation for that

I think it might be better as a portableapp

Could someone do that ?
write a script and roll it into a portableapp

Thanks