Can ver.6 & 7 coexist on 1 machine

We have version 6 running all the way. The upgrade ,or migration to ver.7 looks complicated (at least that's the impression I got from the manuals) I would rather sacrifice disk space and install ver. 7 onto a separate directory, so that the old users can use programs developed on version 6 and keep what's they have been doing, while new users can use version 7. How's that ? If this is feasible, what things should I watch out so that the 2 systems can coexist and have no conflicts

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[----------------ooO-(_)-Ooo---------------] PM Wong (Computer Officer)

[User User User User User User User User Us] CTSC Hong Kong Baptist College

[ser User User User User User User User Use] 224 Waterloo Road, Kln. HONGKONG

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[------------------------------------------] Email: pm_at_ctsc.hkbc.hk