You have to line the cam sprocket timing marks up with the lines on the belt & mark on the crank pulley all at the same time

. I've heard that using the (large) black spring clip paper binders really help holding the T-belt to the cam sprockets. If you are off 360deg on one of them, you will probably have to find TDC on cylinder one & line everything back up. I dont know the exact details for your specific model, best to get a service manual.
G/luck
Joel
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2007 Chevy Cobalt LS 4dr, auto
2008 Honda Odyssey LX chick magnet
Gone but not forgotten

: 2001 Ford Windstar LX, 2005 Trailblazer LS 4x4, 2002 Isuzu Rodeo LS 4x4 & and many more.