The first question is why are you overclocking. Most people overclock in order to overclock their processor. The idea there is to increase megahertz.
There are two parts to overclock the memory. The latency (the settings that you saw) and the frequency (1066mhz).
The latencies you have are actually pretty good. You could probably increase the latencies to 9-9-9-24 and bump the megahertz up to around 1600mhz.
Here is a gude for you to read. http://www.pcstats.com/articleview.cfm?articleID=1804