I just finished setting up Bootcamp, building XP, getting it working, and restarted to OS X only to find that I cannot get back to XP. I have two internal drives and I partitioned the second one into an NTFS (unused) and a WIN-32 FAT, then installed XP SP2 on the FAT side. All went well, it installed, it worked, I was in Windows. Now, I restart and hold down OPTION and I never get an option to chose the Win partition for startup.
Furthermore, if I look at System Preferences > Startup Disc in Mac (OS 10.5.8 on MacPro) I only see my first internal drive (with Mac OS on it) and a question mark over one called Network Startup, no Win-32FAT or BOOTCAMP (what I named that partition)....
Treeline Film Company