:DI just did a 1998 2.5dohc 2 weeks ago belt and valve job with perfect results.Even though the Haynes manual which was very helpful gave step by step diagram of the process,i deviated a little from their instructions. I lined up all 4cams double notches on intake at 6 o clock,double notches on exhaust 12 o clock both sides, I lined my belt up on crank-shaft first used a small pair of needle-nosed vice grips to hold the belt on the crank gear then routed the belt over the passenger-side cams came across the bottom side towards the waterpump & tensioner , then around driver-side exhaust and last onto driver-side intake which I turned very slightly by hand counter-clockwise as I slipped the belt on,
I had to do the whole process 4 times before I got it lined up perfectly and then I almost forgot to pull the tensioner pin before removing the vice grips from the crank. I was able to do this alone and i'm handicapped & on oxygen. I would recommend taking your time & make sure all the cams are lined up perfectly,even if you have to do it a few extra times. When you are done the 3 lines on the belt should line up with the crankshaft and the cams.Then when you rotate the engine by hand to make sure your not binding up you will need to forget about the 3 lines on the timing belt as they won't line up again for maybe 100 full engine rotations. Your cams should line back up every 2 or 4 times you completely rotate the crankshaft 360 degrees.If the cams line back up every 2-4 rotations your installation will be a success.
Good luck I hope this is helpful!