Lets see if I can formulate myself: I would like to test a custom theme with existing data I have in my blog/website (I actually use Wordpress more as a CMS than a blog).
In other words, instead of testing with test info that is available on the net I'd prefer "real" content.
I would have my test WP installed on the same server as the live blog (simply installing it in another directory).
Would it be possible that without copying/duplicating the database of Blog A to Blog B, to simply "snatch" the content in some way? If possible it would include categories as well.