some questions about led matrices

[midgetfidget]

I'm building a midibox 64e that has an 8x8 matrix of leds (built by me, not a bought one) and I was wondering how to wire it. I looked at the wiring diagram for the Midibox Sid's matrix. Would it work if i essentially copied that, but expanded it for 8x8?

Would it be easy to implement in the firmware?

a last question, in a matrix are all leds able to light seperately?