[Synthisternation]

Once I'm in Multi-Mode what do I do to layer the patches? I simply hear one patch, and when I go threw the parts the other ones don't seem to sound. Also, how do I copy the patches from single to multi? I know this is the most newb question. If someone would just link me to a tutorial that'd be great too. I have an access virus TI2, and I don't use it as a VST.

Thanks!