OK ALL,
You might have read one of my MANY requests for information on a DVD-r reading problem over the last few weeks. I was having trouble, along with many other I have noticed throughout the web playing some burnt DVD's. I have found out that XP does not support some UDF file formats with some DVD players. My resolution to this was to get a program called SAI FILE SYSTEM SWITCH UTILITY. Sorry, I have lost the link.

I'll try to hunt it down again. It is also known as READ NOW! and appears to have a DVD Burning application (I have not tried) called WRITEDVD! Apologize for losing the link, but maybe this will help some people out there. Hope this helps for those who can watch a DVD on one computer, but not another.