Hunter301 !
If you read the tutorial carefully you see that there is a section called Mods and Tools required. You have to apply some fixes manually, details can be found in the respective readmes; but why not use the massive Improved U Boat Mod?
It installs most of them automatically.....
Get this and all other mods at Terrapin's site who very kindly has made some webspace available:
http://u-boot.realsimulation.com/