external script as a plugin / module

[phpman]

Hello all,

i would like to make a plugin for get-simple based on an external script with running on flat file datebase.

Following open questons:

1. Which kind of modifications i have to do to change the script?
2. what i have to do to use the existing "login system" of the get-simple admin to use my external script which has own "admin,php" file for login?
3. what i must do to setup multi-language into the script?

Hope anyone can help me in this case.

Thanks.

best regards,

Harald

P.S. it is a calender with booking system nicht to use good go get-simple but currently only external.