You need JSGME.
It's a Mod enabler, written and provided to us for free by JScones.
Get here
http://www.subsim.com/radioroom/showthread.php?t=156898
There's good info also in that thread, and the download comes with a readme.
Basic rundown - you need to install JSGME into your SH3 folder.
Run it once, this will create a MODS folder in your SH3 folder.
Move your mod into the mods folder, then run JSGME and enable your mod.
It's dead easy to use.
You get any problems, come back here.
There's usually someone around who'll be happy to help out.
You have any problems running it on windows on a Mac, you can ask me.
I'm running SH3, SH4 and SH5 on a Mac via bootcamp.
Good luck dyslexic doggie, let us know how you get on
