yet another biwiring qeustion...

Ok, here is the deal.. I have some speakers that i want to biwire. now, my reciever accepts both banana and spade ends. currently, im running a set of Z1 cables from my speakers to the reciever connecting with the banana plugs. I spent 80 each on the cables and Id like to use them. my question is, can i biwire by running a second set of cables and connecting them with the spades or will that kill the signal? Do i need to just splice two sets of cables and recrimp the ends? I really dont want to cut the cables... im on a pretty limited budget.
any useful info would be appreciated.

I bought the wires when i first bought the speakers before I really knew about biwiring. Now that I have the cables for running one set per speakers I was just wondering if that setup was possible without a loss of quality. Since i spent the money on the cables I really dont want to not use them.