You could have, instead of making a new directory, opened up a command prompt, cd into your prime95 directory, and started a second instance with the -A1 switch.
eg
cd \Program Files\Prime95 <return>
Prime95 -A1 <return>
Doing so will start a new instance of Prime95, which you then put in all your information just like a new install. If you turn on the start at bootup option in both instances of Prime95, both will automatically start whenever you restart your computer.
I don't know if setting the affinity is necessary with hyperthreaded machines, but it might also be worth a try.
This is what I have done on my dual processor box, and on my hyperthreaded boxes.
Last fiddled with by endless mike on 2005-10-19 at 21:01
Reason: looks like the A should be A instead of a
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