I am the DA that tried to manually install my mods in SH3. I can't remember how many clean installs I had to do before I got it right. I didn't think JSGME would work for me. Where was my head at?-Oh don't answer that. Although I used his stuff in CFS2 and it worked great. Plain and simple "I Did Not Think."
Read the thread/Guide, get the newest version and load up. Pure & Simple. I am a firm believer that if I can do it. Anybody can. I started to say I would rather be without coffee than JSGME, but that's a bit off the deep end. My cell phone maybe.