Now I used CS3 photomerge and it worked a lot better, nearly fully automatic using the interactive layout setting. Which is a bit of a must for Moon mosaics, I think one crater looks very similar to another for CS3 ;-)
... and the fullsize version - 1.9Mb
I love that crater in the middle top; Drygalski, also visible in my image right on the top horizon.

Here's one of my best Clavius images to date. Best 500 images stacked in Registax and mosaiced with CS3 Photomerge.