It's been a while since I installed Cobl Cosmetics, but if I remember correctly there are "core" files that get installed regardless of what you're running. Then there are 3 directories that say something to the effect of "install next if ... is installed", with the "..." being exnem, ff, and robert's (in that order, I think). So if you have exnem (and by extension HGEC), then you would install the exnem files. However, I do not recall there being an ESP to "activate", so I may be forgetting something. Hope this helps.
veg