Lester, that's a very good result considering the seeing - very promising for the future. I couldn't get anything worthwhile at all tonight. I believe the way around the frame limit of long AVIs in Registax is to divide them into smaller sections with VirtualDub and then load them all into Registax. I seem to recall doing this successfully on some longer Mars AVIs last year.
Here's a reference to this workaround from the authour of Registax.
http://qcuiag-archive.technoir.org/2006/msg00027.html