Turning pygame apps into add-ons

[elisha hollander]

I have a folder with my pygame apps, I want to build a program to have a
nice interface to access those apps from, I want it to be like an actual
computer, so, I need it to open the apps as rect of something not as
external apps.
Is there a way to do it without changing all the codes?
(I can import the app from the app file, but it won't open in the interface)