The only difficulty in customizing is geting started. I am myself have not had extensive modelbuilding or painting experience, but with alittle inspiration. I have made a significant increase on my collection. Ideas can come from a number of areas, Star Wars Expanded Universe has actually been very helpful, check out a Star Wars Gamer Magazine, there are anumber of ideas that you can expand on. For painting tips, check out a number of the star wars customs site.