You are better off to patch it to 1.5 (the UBoat Mission add on). Fixes a lot of issue the original stock game had, and the mods for SH4 are for the most part geared toward version 1.5.
Check around though for adding mods to the Steam version of the game. Some folks have had issues with it, mainly because of the way Steam loads onto the hard drive from what i can tell.
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A legislative act contrary to the Constitution is not law.
-John Marshall Chief Justice of the Supreme Court
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