Thanks for the reply - sorry for the delay.
I have now captured a 2008 wim file with all of my addition programs install (SQL, Visual Studio etc) and would like to create an individual xml file however I am having problems with using image manager - the common parameter count mismatch error whenever I try and use it. I have tried using it on XP sp2, the actual 2008 server.
Does the individual xml file require less information than the main one? I have used the sample xml file mentioned in the links you supplied above which work fine generally but don't seem to make a difference on the individual basis?