Realtek ALC650 AC97 Sound Drivers...... Change Output Ports?

[edro]

I have a Shuttle XPC with an onboard Realtek ALC650 support 5.1 channel audio (AC97).

Can you change the speaker outputs to:

RED = Microphone
BLUE = Rear Speakers
GREEN = Front Speakers

I have it set on "4-Channel mode for 4 speaker output", but the RED is Center Speaker/Bass. I don't have a center speaker, but I wanna use a microphone on the back of the computer, not sticking out the front (cosmetics).

Anyway to change it?