You can do a lot of things with iFile. If you're a Windows computer user, iFile is the equivalent of Windows Explorere in that you can access yor phone's system. Only thing is that it's like any other - don't remove stuff you are unsure of and always make copies and backups.
So, really, the question is not "what can I do with iFile," the question is: What do you WANT to do with iFile?
Marilyn