As far as I know the 1305 patch only works on the vista edition of the game. If you really want to try it though just rename your data_****.na and data_****.ni files and you will stop getting that message and the beginning of the game seems to work fine. There may be problems eventually though.
Note: **** would be 1101 or 1201 which would be changed to a00. The files are in the release folder. If you do this let us know if the game is playable all the way through.