Ok first u need to download the upk modding tools (thx to BlackAlpha) http://forums.nexusmods.com/index.php?/topic/820867-here-are-upk-modding-tools/ If u just want to change the medal u only need to decompressor the XComStrategyGame.upk and open it with a HexEditor. Search for line (Hex Search) "24 01 24 98 24", that should look like this: ... 24 01 24 98 24 99 2C 04 2C 03 16 1B 2D 05 00 00 00 00 00 00 24 02 24 9A 24 9B 2C 03 2C 03 16 1B 2D 05 00 00 00 00 00 00 24 03 24 9C 24 9D 2C 02 2C 07 16 1B 2D 05 00 00 00 00 00 00 24 04 24 9E 24 9F 2C 02 2C 0A 16 1B 2D 05 00 00 00 00 00 00 24 05 24 A0 24 A1 26 26 16 04 0B 53 ... The red market nr. are the medals, change them to what u want, save, use Xshape and HF. If u wane change more there is a very nice txt tutorial in the upk modding tools.