The people who have done this have as far as i know made use of a program called artmoney. They have found the BG element and turned it pink. I don't actually know how to do this one on purpose.
In this case, i'd find a character that's using them (POTS has actually released the CVS2 sparks as a pack) and ask if you can have them. They may also already be ripped and up for download. The path you want would probably teach you a lot, but it ain't gonna be easy.