Installing GSS 3.2 on existing server running 2.5

Hello all,

I will be transitioning from GSS 2.5 to 3.2 but before I do I have some questions / good practice tips,  that I could not find answers to.

        NB: 3.2 install will be on same server as existing and operational 2.5 service.

• 2.5 agent has been deployed to my client PC's, should I remove this agent via Ghost Console before installing 3.2 ?
• Assuming I use a different install path I can leave the 2.5 install intact ?
• I should prevent ngtray.exe from running by removing entry in run folder of registry ?
• Is there anything else I should do to prepare for an easy transition, I have checked software and Hardware requirements of GSS 3.2 and my server meets the specs?

Looking forward to your comments.