How to become a solid cracker (Advices for beginners).txt

Sure they don't.
Also this is not impossible to write an unpacker... The driver should only gain the lowest control, it don't need to be full of procedures - I see using this level only for initialization, then giving back full control to main thread. Most of the people are scaried with XProtector because SoftIce extensions doesn't hide this debugger - Then legends about XProtector are being written...
Syd (Stripper author) was the first one writing efficient ASprotect unpacker with device driver routines. And I have a big respect for him for that.