Configure XP to put hiberfile on disk other than C:?

Bought an APC UPS and the PowerChute Personal Edition
software to provide automatic shutdown. The Installer
tells me it would like me to enable hibernation.
Using Control Panel --> Power Options --> Hibernate tab.
Windows balks at enabling hibernation because I have too
little room on C: (actually, I didn't before installing
PowerChute 8^) ). This is an old machine, what can I say?
2.5G system disk. Anyway, I have plenty of room on a
second disk. The Control Panel doesn't give a way to make
the PC hibernate elsewhere than on C: (possibly because the
BIOS needs to find it on powerup??). Is there a way to
configure this, or am I out of luck?

Thanks in advance