A bit more info on Micrografix Picture Publisher;
It can import quite a lot of image files and can export quite a few too. Paintshop files wont be read as layers though ..so any instructions on the templates need to be painted out.
The program also uses a limited edition of windows draw. The whole package is fairly simple to understand and very well suited to painting cars for uk dirt. It has its own layers system and these can be retained through saving in its native mode if desired. I havent found anything yet that cant be reproduced in terms of skinpainting.
Paint can be applied in many modes , mostly I use merge , and the programme has masking tools which are extremely useful. Masks can be made from objects/images and these can be merged. How you wish to paint different cars can be done in different ways depending on your own preference for which methods and in what you want as an end result. Simple skins with fairly basic signwriting can be knocked up in half hour with more complex stuff taking appropriately longer. If you have a set of masks prepared for numbers/ signs etc then its possible to knock up skins in less than ten minutes.
Its certainly worth trying to get a copy as its a very real alternative to paint shop or print shop.
I also considered microsofts old Photodraw software and though its possible to knock up skins using it they are much harder to do and of poorer quality and it takes much longer. Photodraw really isnt suited to skinpainting.