Setup a P4 2ghz with hyperthreading enabled, and checked under XPSP2, I see two processors. I started two different instances (in their own directories) of teh fah_core and gave them different machine ID's. They're both doing the same project (1809) but have different Run/Class/Gen ID's in the log file. They appear to be similar in size and are taking almost exactly the same amount of time to run.. Could I be doing the same WU twice? Just want to make sure I'm not wasting resources..