Pro Tools and Avid Adrenalin - on same mac?

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Can anyone tell me if the following is possible.....

I have Pro Tools 6.2.2le DVToolkit running on a mac G4, and we are going to be moving in a new Avid Adrenalin into my suite for a few months whilst a new foley studio is built and we get the tdm system.

To save space (which is really limited in here) I want to put both the Avid and the PT le on the same mac, rather than having 2 macs and two sets of screens. I know there used to be conflicts with DAE extensions between avids and protools, but i wondered if this was still the case?

Would it be possible to have two different log-ins on OS X, with avid on one sign-in and PT on the other?

anyone have any experience of this?