I am currently in the process of trying to install XP on my MBP and I was just doing some thinking about what can be done regarding the overheating due to lack of fan control. While the main reason for this is probably the overcompensation on the CPU's part for the lack of drivers for the ATI GPU, and this is something that will eventually be fixed, how about using a fan control utility? I was thinking something along the lines of Speedfan, a freeware util. I have it runnign on my windows box and it works just fine, you can adjust fan speeds and whatnot. I am not sure if this is something that would be supported by the particular MBP board, however, the board is obviously able to control its own fan speed via the OS or what not if it runs especially hot with no fan on XP, so I assume that either this program or another would fix the problem. I'll test once I hopefully get XP up and running on my MBP and let you all know, in the mean time if anyone tries this or has tried it please let me know how it worked out.