I think you misunderstood what the disk is that you created... start from step 1 and read the home page here
http://www.ubcd4win.com/
UBCD4Win ( which is built using BartPE ) , is a group of utilities that you can use to make repairs to your computer... some of the areas that it covers are antivirus utils, disk backup utils, repair utils, information utils and many many more... these utils can then be used to create backups... scan for virus or spyware ... repair corrupted files or disks ...
When you created the boot disk... it did not backup the computer... it only made the disk that you can boot your computer from to perform the above mentioned tasks and more in case of trouble etc. But you would need to perform these tasks after you built the CD.
I also suggest you read the FAQ's found here
http://www.ubcd4win.com/faq.htm