Not to beat a dead horse, but I think I understand the confusion having just gone through this. If you have installed Fresh 3.3 and netarchy 4.1.9 cfs, you will be running at a default top CPU frequency of 998 mHz and min 228 mHz. You can then install SetCPU to overclock and/or underclock your phone (by adjusting the slider on the main SetCPU screen), but that's pretty much it. In other words, you should not create CPU profiles (i.e., screen off, charging, etc.) if you're using 4.1.9 cfs as the HAVS voltage scaling (which controls CPU power usage) will conflict with the SetCPU profiles if they are created.
My experience with overclocking is: be careful. Don't just peg the slider all the way to the right or your phone will go into a boot loop. Apparently the "sweet spot" appears to be around 1100 MHz (I'm at 1190). To be safe, be sure to deselect the start on boot option in SetCPU and proceed gradually in steps...that way, if it goes into a boot loop, it will only reboot once and you can then set the slider to the setting just before you went into the loop. I don't think the underclock setting matters that much. In fact, you could make an argument that overclocking doesn't really improve things that much either...after all, it's just a 10 to 20 percent increase in CPU speed (if you're lucky). I'm somewhat new to this, so feel free to correct as needed...you won't hurt my feelings.
