Can somebody help please

[rjav963]

I'm having trouble with burning a game(Alien Front Online). I extract them(winrar) and get mastersplitter files. Then I put them together and get a file that my computer doesn't know. It's size is 138mb which is much smaller than any game i have burned before. I need help on what the next step is. I have tried fireburner, discjuggler, and nero but they don't reconize the file. I have looked on tuturiols that have been posted on previous posts but I can't figure it out. Can anybody help me or at least point me on the right direction?