Simple checksum fixer for BF3 campaign saves (PROF_SAVE). You must extract the save from the CON before running though the tool.
Usage: bf3crc.exe <save file>
Apparently this game has hardcoded max limits for values so when editing don't go crazy, only increment them a bit at a time.
Download: http://dl.dropbox.com/u/37569004/bf3crc.exe