Good point Thom.
Also, Roberto - why on earth do you feel you need 64bit for more RAM?? How much RAM do you think this system needs? You definitely will not need so much RAM that you need 64bit to handle it. There are no individual processes in LMCE that will require as much as 3GB user space, or anything even close, even on very large implementations! 2GB of RAM is usually oodles for the entire machine, much less individual processes. Remember the 4GB limit is the virtual address space limit for each process, not the entire machine, so it doesn't refer to physical memory at all... you can put in 8 or 16GB of RAM in your core if you want, but LMCE will not use it because it is not needed, not because of any 32bit limitation. Even if you wanted this RAM to run VMs, each instance of a VM will run in its own process, so there still should be no real limitation.