QUOTE (jsthomson @ Oct 17 2010, 12:51 PM)
Ideally I would like to get it onto my usb pen drive but not really tried that cos the ISO file is not working on the CD yet.
This is probably as jaclaz suspects... you've more than likely just burned the ISO file to the disk instead of doing it properly and burning it as an image as you were supposed to do. That is the most common error made by users unfamiliar with ISO image files. ISO files are not bootable if that is all that is burned to the disk.
You can easily tell if that is the problem... look at the files on the disk and if all you see is an ISO, then that was the mistake that was made.
It is also possible that you didn't setup your computer to boot from CD/DVD... the method to do this varies greatly from system to system. Some require that you change a BIOS setting... some allow you to select your boot device by pressing a key.
You may also have another option available to you... In fact in XP it is by default that the Administrator account has no password. Boot into Safe Mode and then select the Administrator account instead of a user account... You can then delect the password for the user account from the control panel.