Registering for an account and getting it activated is not difficult, and does not cost anything. Just hit the register link on the front page, and follow the instructions here:
http://68kmla.org/wiki/68kMLA:Forum_Registration
I realize the 68kMLA isn't mission critical and doesn't really have sensitive information like social security numbers or banking information, but it's still a small nightmare from an identity management perspective. What if your friend had decided to misbehave in another area of the forum and had gotten himself banned? If you *then* re-registered, we would worry about you sharing your account with him, and then, if you did reregister and say something like "hey, this is my new name, my friend got banned" -- we'd ban you too, because ban evasion is (unsurprisingly) against the rules.)
Additionally, we're not really the best place to get support for a pirated copy of Mac OS X, even if it is the version from four or five years ago. (More specifically, since we're in the burning a disc phase, it's not the best place to get support for the act of pirating Mac OS X.)
Presuming you did have the original, fully licensed, physical CD around, and were just testing a backup copy you were making, the best strategy would be to try using an ISO or DMG file somebody had created. Toast probably uses a different format, and if you had to change the file extension to get your Windows or Linux CD burning program to recognize it, there's a good chance that toast file format is different enough to cause problems, say, with the partition layout of the mac.
If the problem is at the stage where Mac OS X tries to format the machine's internal hard disk, there's a good chance that disk is broken. What if you take it out and put it in a PC and use something like DBAN on it, or use a tool like Drive Monitor to verify the health of the disk?
http://www.acronis.com/homecomputing/products/drive-monitor/
