im pretty sure it has to be straight out of the box, then patched to 1.4b.
you could always try it and see if it will work. but i dont think it will.
I also highly recommend downloading and using SH3 Commander.
The program can be downloaded here...
http://www.subsim.com/subsim_files/p.../SH3Cmdr27.exe
When you launch SH3 Commander you can...
- create a new career to be loaded within the game
- the program will create a history for your commander
- it will keep up with his patrol to patrol stats
- it will allow you more options for crew medals and promotions
- randomization of escort ASDIC depths to simulate "thermal layers" and it changes every time the game is loaded so you never know where the thermal layer is!
- allows the player to create slight modifications such as deck gun reload times, sabotage and malfunction options etc
- Creates an entire backstory for you commander, birth date, city of birth even what he came to do after the war if you survive
- fully GWX compatable
Stop by the "Silent Hunter III Mods Workshop" forum and check it out... tons of talented modders over there turning out products it seems like every other day!