If you load up WC3, you will see that it says DOS4GW as it starts to load up. It uses that memory manager. The Jemm files might be there as part of some legacy code since Armada is a early build of the WC3 engine I believe (Am I right on this? I know Strike Commander is the original build of the engine). But regardless DOS4GW is the memory manager used by WC3 and all it does is more or less treats all memory the same whether it is extended or expanded.
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There is no God but myself. No destiny but what I deem for me. I walk my path and no others, for I am free.
http://www.ntr.net/~vondoom