To be honest, it took me a full 12hrs to do the job by myself. I could have easily done in it in 3-4hrs if it were not for this problem. I also installed new injectors, plugs and coilpacks.
Not sure if this would help you much, but it seemed to help me. I went to Harbor Freight and bought some small, cheap metal spring clamps to keep the belt in the right area on all three cams. I had problems with the belt sliding off the cams, which in turn would pull the cam gears out of time. Maybe you can try it