Yes this can be accomplished with our group policy manager extension.
Logon scripts for users:
In the Group Policy Management Editor under "User Configuration -> Policies -> Unix Settings -> Quest Authentication Services -> Client Configuration" you will find the Logon Scripts configuration dialog.
Startup scripts for computers:
In the Group Policy Management Editor under "Computer Configuration -> Policies -> Unix Settings -> Quest Authentication Services -> Client Configuration" you will find the Startup Scrips configuration dialog.