my friend was going to talk me through adding a 412 tdl card to and existing systme but due to a family emegency had to go out of town can anyone tell me how to add the new cards he dropped off. this is a dual cabinet merlin magix 2.1 ver 8 second cabinet has a merlin messanger card and a 024 card in the second slot he said that the 491d1 power supply would handle two more cards for right now i only need the exts. to work. can anyone help me out.