I have no idea what your technical level is and wouldn't want to offend you, so I'll just ask that you explain exactly what you are trying to do, so that I can understand and comment on it
I'll just say this: you have to understand that those ip addresses you use with those programs are being used by a lot of people, and you're not the first who thought of using them to bypass rapidshare limits, so...
as an example, I just tested on operator with a rapidshare link, and it didn't let me download, saying my ip (the one given by operator, not my actual one) was already downloading a file