My hard drive is a Western Digital and on it, it has 10 pins (5 sets of 2 across). For Master, you are suppose to jumper the two pins in the middle, we'll call them 5&6. For Slave you jumper the ones next to it, 3&4. But for Single, you jumper 4&6.
http://support.wdc.com/techinfo/general/jumpers.asp
^^^^^Mine is a 10 pin configuration
I believe though that Single is different than Master, its Different obvious than slave, and as well is different to Cable Select. Again, i think someone mentoined that only certain hard drives had it as an option, but if you have a western digital (all of my WDs have it) then you should have it as an option and would recommend testing with it.
PS This is all done with my hard drive being told what it is in the BIOS (auto-detect once) and my other primary & slaves being told "Not Installed".