Try this. I think you'll do like I did and give up on Autostitch.

Attached is an example, stitched from 36 images. ICE is able to save jpg images that are too large for most software to open. The original full-res version of this picture runs nearly 30 MB, and irfanview is the only program I have that will open it. The attached image is scaled way down, to about 3.6% of the original image size.

tanstaafl.