Migrating from Gallery2 back to Gallery1, how?

The following information is required to get an answer:
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful):
http://lnx.sinapsi.org/wordpress/gallery/
http://lnx.sinapsi.org/wordpress/g1/

System Information
Gallery version 2.2.3
PHP version 4.4.7 cgi
Webserver Apache/2.0
Database mysqlt 4.0.27-standard-log
Toolkits Thumbnail, NetPBM
Operating system Linux webx15.ad.aruba.it 2.6.18-53.1.4.el5PAE #1 SMP Wed Feb 13 15:24:10 CET 2008 i686
Browser Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12

After uploading few new albums I am now encountering too many difficulties in managing gallery2 (database errors and others) so I'd like to go back to gallery1
How could export my new albums from gallery2 to gallery1 ?

Thanks.