Just some tips to save you grief in the long run:
a. if you reformat that windows drive when you bring it over to the mac, please take the time to zero out all data on the drive. its a one time process that can save you grief down the road.
b. if your DVDRW drive isn't natively supported by Tiger, the NEC 3520A is, and I've heard the NEC 3540 is as well, then try the free patchburn for Tiger here:
http://www.patchburn.de/download.html
c. don't use USB or USB2, use FireWire at all costs, if at all possible.