Cool. Please post that. Thanks alot.
Ok, here ya go.. Bottom of the guide explains how to backup the HD as well..
Can I use chdman to put a CHD file back onto a hard disk?
Yes you can, at least under Windows. You have to be logged in as administrator, and you have to know which physical volume your target hard disk is mapped as. The easiest way to do that on Windows XP and later is to right click on My Computer and select Manage from the menu. In the Computer Management window, in the tree on the lefthand side, select Disk Management. That will show you a list of all the physical hard disks you have plugged in. They will be listed as "Disk 0", "Disk 1", etc. Make a note of which disk number your target hard disk is.
Once you've done that, it's easy to "image" the CHD file onto the disk. Just use the following syntax:
chdman -extract imagename.chd \\.\PHYSICALDRIVEn
where "imagename.chd" is the name of the CHD file, and the "n" next to PHYSICALDRIVE is the disk number you figured out above.
This technique has been used by several people to restore dead hard drives on arcade games.
Note: that you can also use chdman to create a backup of a hard disk image in much the same way: 1-1 rule = The image you create must be put back onto a drive of equal or larger size.
chdman -createhd \\.\PHYSICALDRIVEn imagename.chd
Visit:
http://www.revisionx.com/kiproject/chdman.html to download Chdman and to get a full walkthrough guide. There is alot of mombo Jumbo here that can confuse you but what I posted above is truly all you need to comprehend. A couple of very simple command lines and the 1 to 1 rule.