You ask the wrong question. You should have asked how to bypass DVDXCopy...
I have just made a fully working copy of Matrix - white rabbit and all - with excellent video quality. It took me 25 minutes. I used DVD2One in 'full disk' mode.
In my opinion the methodology of DVDXCopy leads down a blind alley. Splitting a DVD is a very difficult thing to do. The menus don't work properly. You have to introduce prompts to instruct users to insert the other disc. It can be next to impossible to determine which files are required and on which discs. Moreover, you incur the cost of two blanks instead of one!
The 'split the disc' philosophy dates back to Derrow's freeware tools, which were a step up from spending half your life fooling around with pirated copies of CCE. It continues from a mistaken belief that this is the only way to maintain quality.
But this is no longer true. Modern compression algorithms will give you a backup copy which is to all intents and purposes every bit as good as the original. People will tell you this is not so and that they can see compression artefacts and God knows what.