set sytem and boot volumes for dual boot

I am trying to install two Operating Systems on one hard drive under two different partitions. The issue is that I need to have the primary/system drive be different on each partition. The default installation sets the system volume on the same partition for both OS install.
Is there a way I can set the system volume before the system is loaded???
I am aware that Win2000 does not allow you to rename the active sytem and boot volumes.

Any workarounds.
Thanks