Toy hilux body mod help-dove tail, bobbed bed ETC
 

I need some help. I want to build a toyota hilux rig and I want to do some body mods such as bobbing the bed, dovetailing the bed and dovetailing the nose. I would also like to do the step through drop down door mod also. If anyone has done any of these mods and can give me any tips on how to do these mods I would appreciate it. I have never done any work with styrene before ,but I beleive I can get it down with a little practice. Thanks.