I've been using a different method for my restores. I have a series of batch files each named restore.cmd (in different folders and mainly relating to different WinXP and Win7 images). Using tbosdtw.exe the relevant restore.cmd is copied to the TeraByte WinPE partition (over-writing the file in the partition), BootNow runs and causes a boot into the TeraByte WinPE partition, restore.cmd runs and IFW does the restore.
So to restore a WinXP image from WinXP, I just run the relevant batch file and it all happens.