I have two files, one is a mpg and the other a dat both video files, they are both slightly larger than a 80min cd, tried winzip, still larger. is there a way I could change them to some other format that can be saved in a cdr plus not losing the image quality?

Try using winrar (http://www.rarsoft.com/download.htm) to compress and cut into multiple smaller files. Just open up winrar, drag and drop files into the window, and click Add. Select Compression method (go for max) and Dictionary size (go for 1024KB). Then just enter what size files you want in the Volume size box and click ok. Winrar will then make a series of smaller archives with the extentions .rar, .r01, .r02, etc. You won't loose any quality because your not changing the original media file. Hope this helps

Thank you very much