biamping my Virgos - can someone educate me?

i happen to have purchased a Parts Connection SET amp which i have been extremely impressed with. i currently own a Symphonic Line amplifier. I was thinking of bi-amping my Audio Physic Virgos (i.e. SET on mids/highs and SL amp on the woofer). Sound like a good idea? what would i need to accomplish this? BTW, recommendations of specific products are welcomed along with the generic explanation of how bi-amping works. thanks for the help.

gregg