Ditto that; the extra speed you get from the memory controller being on the chip itself can speed things up a little bit, and the 32 bit mode is just like an Athlon's. E-on won't recompile until XP-64 is out, but if reports on the ease of recompiling hold accurate, then they could easily do it in 2-4 days with a single programmer. Rewriting it to -be- a native 64 bit app would take longer, but recompiling to allow for the 64 mit memory calls, and to run natively in XP-64 is supposed to be a lot easier.