I have SL 10.6.8 running on D620Nvidia in 32bit mode.  This is a 32bit only D620.  I would like to get it running on another D620Nvidia 64-bit machine in 64bit mode.  Is this supported?  If so, can I clone the first D620(32bit) to the D620(64bit) or is a clean installed required.   I have already tried the cloning method and it doesn't seem to work with -force64 flag, but maybe some other tweaks need to be done. ?   As I write this I'm trying a clean install on the D620Nvidia 64bit machine. 
  
Thanks