[HeresJohnny]

The codepage problem is usually already introduced by the original uploader and the way they encode their file. Many still use their regional codepage instead of utf8. This leads to problems if the system that reads that codepage is running a different language / codepage. Unfortunately, there is no way to autodetect codepages, apart from utf8 encoding. This leaves you with the only option to manually convert the file by trial and error, guessing the original encoding. I find Akelpad to be most easy to use in this respect.