If you don't have any posts in the new sites db then this isn't so hard.

Do a backup of your old db and restore it into your new db and then run the installer and choose upgrade.

Then you need to hit one of the config files ( urm, /conf/_advanced.php I think, but root around and you'll find it ) and change $allow_moving_chapters.

Then create a shiny new blog that will house all your old blogs posts.

Finally, hit the categories for your old posts and move them all to their shiny new home ( they'll take the posts with them ).

Then your shiny new blog has a shiny new blog all that should never be used as a normal blog just like the posts that are made on a new install tell you, and your old blogs posts should be in their own shiny new home that isn't the shiny new blog alls home and all is well :D

¥

Thanks.

I had done the backup/restore but wasn't sure what to do for the next part of the process.

Regards
Anthon

All done. The instructions were just about spot on except that the file I needed to edit was conf/_main.php.

Thanks
Anthony