You might try taking the key off of the keyboard and seeing if there is a wire. If so you could detach that. If not maybe you can use a piece of tape or something on the underside. Not too sure what the underside of the keyboard looks like. I got a powerbook myself, and I can't really figure out how to get the key up, like I could on the ibook. Let us know what you find out.
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"Fix it 'til it Breaks."

Jacob - EiC & Director of Technology
Mac Pro Quad 2.66 - 4GB RAM
160 GB SATA RAID 1 - 650 GB Storage
Quad 19" Widescreen LCDs
Accessorized to the Hilt