Logon script to install software to run w/o admin priviledges

[Hybrid_theory]

I'm trying to get a script to work from Group policy to install a photo editing software from google called picasa.

My script currnetly looks like:

IF EXIST C:\picasainstalled-dont-delete.txt exit ELSE start \\timothyclass\Data\picasa35-setup.exe /S /L

echo.>C:\picasainstalled-dont-delete.txt


and a parameter when placed in group policy of: runas /user:student.timothy.com\Administrator

Although im guessing it wants the password and doesnt prompt for it .

Any suggestions on how i can do this?

 

[Hybrid_theory]

I got psexec to at least install this 1 by one from the server to the computers. not sure if this spikes any automation ideas. Basically if a machine was swapped id like it installed either with RIS or a bootup/login