Thanks for your comments!
Well i don't have a particular secret!
I love do evil or bad guys edits so my fantasy run wild when i sprite them!
My only suggest is this,choose well the pose of the char that you want edit and choose with more attention the pose of the parts that you want print on the first sprite(i'm sorry my english is not perfect,so i hope that you understand what i mean!
)
Take the example my sprite edit Yamazaki Night Out!
His body is an edit of Guile(SVC Style) i choose the appropriate sprite(in my opinion) for do him!
Hope that i explicate well!
Concerning free use sprite i can't help you because often i rip the sprite that i use.
Here my recent work:
Orochi Joe!