Recording Live Band With Logic 7 Express, USING TASCAM FW-1804 Options

[ejani]

Please can anyone help? I am recordng my band with my MACOS X G4 using Logic 7 Express Audio only and no MIDI.
With Tascam FW-1804 using Core Audio and I can only use 8 audio inputs. In Tascam manual says you can have 18 inputs that include 4 XLR INPUTS,4 LINE INPUTS,2 MIDI INPUTS & 8 ADAT INPUTS ALL makes 18 inputs.
My Question now is How can i get to use all the 18 audio inputs and not use midi and Adat input since I dont have Adat machine and since am not using Midi?
I have a big band to record live and we are using my Mackie Console Mixer 24 trck 8 buss so i realy to use the 18 inputs or more.
Thank you.
Orlando from Ghana Africa.