<html><body> Dear Gate users I have a few questions: 1. Does GATE and/or Geant 4 runs faster in a 64-bit system? or there is no significant difference between a 32 bit vs a 64 bit system? 2. Was GATE and/or Geant 4 written to take advantage of a dual-core CPU? Alternatively, what's the most efficient way to run GATE on a dual core CPU? One simulation at a time? or 2 or more? And one more question: The initial random seed number (the first int number in .rndm file) is the same in the files: beginOfRun.rndm and endOfRun.rndm. Is it supposed to be so or it's something wrong with my system? Thank you. Serg.</body></html>