fill out your W-4 for 2010 to have no taxes withheld.
There are a bunch of online tax estimators, here is one:
www.taxbrain.com/taxcenter/w4calculator.asp
Calculate what your pay will be before you make a change. You can probably change your W-4 now and get a jump on this. However, your withholding is probably $5000 a year, or less. How is it that you can't figure out a different way to meet your bills?
Also, you are wrong about "thinking" that you will be able to pay those taxes at the end of 2010, you WILL pay them one way or another. If you don't, it will end up costing you much more later.