OK trying to figure out how to mine Litecoin along with Bitcoin...I am at "My Eligius"...then under "Configurable Options"...I see something there about "NMC Merged Mining Addr:"...I was thinking I would enter a NMC payment address from my wallet there..then when you enter it it asks for Signature then you get a message saying "You must use a bitcoin client which supports standard signatures, or MtGox, for your mining address to sign options!".  Can someone explain what I have to enter for a signature? Thanks!