[Request] Client Login Plugin (Details inside)

[TDT-Alpha]

Hi there,
my second request for today... If I could (also) learn PHP I wasn't asking for these..
Anyway, I need to make a Client Page which will be a Login page to a group of pages which will be:
Client Files (Yes the plugin), Client-Designer Chat (Actually a kind of comment system, I'll try the External Commenting plugin) and project\s status page.
To access all these pages the client will need to put in his Client # (just a user-name made of numbers...) and his password.
Then he will be re-directed to a main page of all the above.

Actually, the first question is: Is that possible using GetSimple? Because I couldn't do that alone, or with my team (Actually, at the moment it's the same XD)...

PS. Each client will have his own sub-directory named after his ID, inside it there will be all the data of the above.

Thanks and have a nice day,
TDT-Alpha.