Yeah BuBBy's correct. For anyone that's curious, I do indeed have DiskImage Pro 3, having upgraded from Diskimage Pro 2. I used to trumpet the praises of O&O software - O&O Defrag pro is superb IMO.
But sadly I began to encounter problems. After upgrading to DiskImage Pro 3, for reasons which remain unknown, I found myself unable to mount images without BSOD critical system errors. Also (in both versions) when I did have occasion to restore my system partition from an image, again for unknown reasons, I always had to reboot into safe mode, and reinstall my Graphics display drivers, before I was able to access windows normally again. I did raise a support ticket, which admittedly I eventually let lapse at my end - but let's just say I've had better support from other companies. My problem with mounting images was cured after some time, when an updated version 3.2 was made available - but by then I'd already purchased Acronis True Image Home 11, and changed allegiance.