you can install them side by side
but your profile info may be messed up a bit
especially if you go from ff3 to ff2.
( but the hedgehog can never be buggered at all beards, beards, as far as the eye can see, Sat 29 Mar 2008, 16:30, archived)

ah ok. Thanks both of you.

( Pasanonic WARNING - May induce flouncing., Sat 29 Mar 2008, 16:34, archived)