After reading all the threads on how to convert dvd's to play on your X5 (or any other portable device) and wasting countless hours trying to get them to play as nicely as you would want them to I came across an excellent and easy to use piece of software from slysoft called cloneDVD mobile.This made the whole process a breeze with stunning results and in no time at all.Check it out here
http://www.slysoft.com/en/ Whilst you are there check out also AnyDVD which gives you the ability to copy your protected dvd (you are allowed to do this as long as you own the original)
When you are all done play on your X5 with the marvellous tcpmp player with all the relevant codecs installed
Here is the link to all you need to know about the player and codecs
http://www.aximsite.com/boards/showthread.php?t=118109
Oh I forgot to say all the Slysoft software can be tried out in full function form for 21 days so you get the chance to try before you buy...........and no I don't work for Slysoft!!....I just appreciate good and easy to use software that delivers excellent results without taking hours and being overly complicated.