[K12OSN] upgrading k12ltsp

[Carl Keil <carl snarlnet com>]

Can someone describe a good scheme for upgrading an install of k12ltsp?  
I'm running an FC3 based version right now.  I'd like to upgrade very 
soon to whatever is stable right now.  I have my /home directory on a 
different physical hard drive, but I'm wondering how that helps me now.  
I'm thinking that there must be stuff that gets changed in the /home 
directories for the new version.  How do I update all that stuff while 
retaining the users' home data?

So, what's the procedure here?  I'm thinking of physically unhooking the 
/home directory drive in the computer, then installing k12ltsp as usual 
from disks on hda, then hooking back up hdb and pointing home at it in 
fstab but something tells me this won't work very well.  Not to mention 
losing all the customizations.  What do others do when upgrading?  
Somebody must have a really easy/foolproof set of instructions for this.

Thanks,

ck