Yes, you run a test for each core. Since you have a dual core CPU, you would run 2 threads.
For such a moderate overclock I would just run Prime95 Blend for a few hours. Don't change anything, just start up P95, make sure blend is selected, hit OK to start the test, and see if it will run for a few hour without failing.
If it does not fail, fire up a few games and have some fun. If you don't crash, your good. If you do start pushing your overclock higher, which should be pretty easy with that CPU and the P5Q, you will want to run P95 Blend for longer periods of time, maybe 10-12 hours.
Maybe you are right , but all people here using in-place LARGE fTT's setting.