Can a Power Mac G5 2.7 dual processor be run as a single processor?

This is in relation to my last question that I may have mis-worded,

Can I run a dual core, dual processor, as a dual core, single processor, and if so, how do I do this?

This is the info on;

About this Mac:

Power Mac G5

Machine Model 7,3

CPU type Power Mac G5 - 3.1

Number of CPU's 2

CPU Speed 2.7

Any Help,

Thank you.