You could try editing your boot.ini file
My dual boot reads:
[boot loader]
timeout=20
default=multi(0)disk(0)rdisk(0)partition(3)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(3)\WINNT="audio" /fastdetect
multi(0)disk(0)rdisk(0)partition(2)\WINNT="regular win2k" /fastdetect
seems self explanatory - timeout and default values with the OS partiition and location specified (I have one drive - partition 1 is some Dell thing, partition 2 is my c: drive with the audio build, and partition 3 is the regular OS)