Yeah I don't see why anyone would have a problem with RAR files, they're basically no diffrent then a Zip file, and I also don't get why anyone would say they don't trust them, that just really doesn't make any sense. All you need to extract the files is a program called Winrar, like I said, it's basically the same as a Zip file, it's just better. Winrar will also unpack Zip files for you too.