FC multi version install: re-using partitions

[David Niemi]

Yes, generally a multi-version install has been covered just want to
know about re-using some of the partitions.

/dev/sdc2             7.6G  3.8G  3.5G  53% /
/dev/sdc1             145M   31M  107M  22% /boot
/dev/shm             1005M     0 1005M   0% /dev/shm
/dev/sdc7             9.7G  1.1G  8.1G  12% /home
/dev/sdc3             7.7G  2.5G  4.9G  34% /os2
/dev/sdc5             6.7G  938M  5.4G  15% /var

I've FC4 i386_x64 installed and for testing compilation would like to
install the regular i386 version. Reusing the swap partition should be
fine, install /boot onto the / partition instead of causing problems
with my main install. The /os2 partition is where I'm going to install
the other version. 

Will it cause problems re-using /home and /var (probably problems with
the latter).    I'll probably have to backup /home (cp -pR), install,
create user(s), login then out and then as root copy everything back.

Thanks