Yep - not sure if it happened just as you suspected, but the result turned out to be the same - somehow I ended up with a RUB1.44 folder within the RUB1.44 folder in the MODS folder, so of course the mod enabler wasn't able to get it right - once I got rid of the extra RUB 1.44 folder, the install went just fine
Now I just have to decide whether I want to go whole hog and try SH3 Commander as well, or just stick with RUB 1.44 for a while. So many choices, so little time
Great Work Beery et al. !