Resize partitions without erasing in DU

hi all,

I have a tripleboot of, leopard, jaguire, and OS 9, on one drive, two partitions. The leopard partition is 71gb, the jaguire and OS 9 are on a 2.75gb partition. I decided I want to replace jaguire with tiger, and I need more then 2.75 gb.. in disk utility, it will let me shrink my leopard partition, but will not let me increase the other one. I did boot off of the install dvd for this,

I only am on the hard drive so i could take this screenshot

It seems the only way I can do this is to complete erase the OS 9 and 10.2 partition and make a new one.. I dont want to do that if possible.

-thanks in advanced