The memory restrictions are indeed very constrictive. FPSC Editor with only a blank flat map already consumes over 700 MB, and it seems even each individual character entity placed adds on 6-10 MB more. So the cap is reached in no time at all. Doesn't matter how big we can make the maps if we can't fill them with more than a few props.
PC SPECS: Windows 7 Professional 64-bit, AMD Phenom X6 1100T 3.60 GHz CPU, NVIDIA Geforce GTX-680 2GB GPU, G.SKILL 16GB DDR3 1600 (PC3 12800) RAM