I just realized something really important regarding cartooning in Xara Xtreme. Why am I creating line art, when I should be using filled shapes? Not only do I not have to colour them in, but I choose the display hierarchy. If I create a wheel for instance as a filled shape, that can then be used both sides of a car picture that's not head on, provided the car is a filled shape too.
I can be really thick at times (slaps head). Never mind - hopefully, I'll post an example by the end of the week. By the way, a "kenco moment" is the same as a "eureka" moment, only coffee flavoured... :)