Whether you use ICE, Hugin, or File->Automate->Photomerge... built into Photoshop, they are all good options for stitching.
Here is a link to the Hugin tutorial:
http://hugin.sourceforge.net/tutorials/scans/en.shtml
Bottom line: Don't skimp on the overlap. The more of an overlap you provide, the better the automated stitching works. E.g. for a centerfold scan, do a left, middle and right scan. That way you can leave a border on either side and give the stitching program more leeway to crop to straight lines without losing content.