I used Pfsense 2.0.1 RELEASE i386.iso
I must be honest, when it gets to the end of the installation I am not too sure which option to use, so tried all three until it boots.
The last install I did I used the top option which is multi something?
I did read something about the serial connection, which I think is the middle option which I did choose once.
Sorry for my lack of terminology!
Thanks for the input.