k-centre

Hello, just found your site in the nick of time. I've searched alot and not found an answer to this question: I am all geared up to replace the timing belt and water pump on my 159,000 mile 99 Outback with dual cams. I've read Haynes and endwrench, but still am unsure of how to keep the camshafts from moving when I remove the pulley bolts. Could someone instruct me on this? (Yes, I'm too cheap to buy the Subaru tool to do it.) Thanks in advance.