Okay....I've got it working.....
There is one thing you have to do.
1. remove all mods installed
2. Rollback SH3 comander
3. Unzip the IUB103 file.
4. Start up windows explorer and go to the IUB103 directory. Double click on it. Inthere is a directory called Improved uboat 103. Cut and past this directory in your mod directory. and install it through JSGME.
5. Reload SH3 commander.
6. start game...it looks totally different now..
Good luck!!!