Startup Addon

Hey guys!

Don’t know if this is the right place to start a discussion. But, I’ll give it a go!

I’m thinking about creating some sort of “startup preferences” addon.
Helping a lot of friends out with raspberry pi’s and want them to be configured out from my image that when they start everything up for the first time.
I want a popup window asking questions so the user can enter specific usernames and password to subtitles and so on.

Can this be done or is there already an addon out there solving this?

Thanks

/ T