Installing AEP on windows server 2008

Hi, 

On RHEL I have several instances of AEP running on the same server e.g Dev, Prod, Test etc by creating separate users and installing in separate subfolder within the Accelrys folder e.g

/accelrys/aep91prod

/accelrys/aep91dev

etc.

I'm trying to acheive a similar setup on Windows 2008, however the installer always wants to install into

C:\Program Files\Accelrys\AEP

and doesn't give me an option to change this, so just recognises an existing install and looks to repair / uninstall it. I haven't tried creating a separate user account as it installs in c:\Program Files\ rather than a users individual folder.

Can I have several concurrent install of AEP on 1 windows server and if so how do I do this?

Thanks

Joe