Uninstall: how to get my partition back

[Ted Goranson]

I installed YDL 2.1 on my Pismo as  triple boot. Worked well, but now 
I am rearranging things. YDL goes on an old desktop and I wish to 
reclaim the disk space on the Pismo.

I have a 20G disk that was divided equally among OSX, OS9 and YDL. My 
disk utilities can "see" the boot partition of 10M that I was easily 
able to make HFS+. How do I get the missing 6G back without trashing 
my other partitions?

Best, Ted