Thanks for the response, I guess there are just some maps that will never run well.
I Figured it wa sa memory hog but expected it to run like silk once I went from 4GB DDR2 to 8GB DDR3, though I'm not seeing an actual increase in the amount of memory CoH is using regardless of the map, doesn't break the 4GB mark (on 64bit OS).
Guessing it's a limitation with CoH itself and as you pointed out when mapping we need to be extra careful how much we put in, probably need to revisit my own map once 've fully fleshed it out.
Thanks again.
There's a Tool around to increase the memory usage for game exe's, can´t get the name right now, but it's intended for 64 Bit OS user's to benefit from more than I think 3320 MB of Ram use.
Dunno if it'd work with CoH but I've read that it works with some games.