Image backup cannot be perform on system volume, like c:
to use image backup, you must install the image agent for win2k
(included in client program)
then start its service up, reboot, then you can perform image backup
manual or in schedule.
To rebuild your crash win2k, you have to build a new OS with tsm client,
then restore image (just like d:), 
files of system volume, and system object.