You may have an existing site, and want a convenient way to install the Captify module, and have it "work".
Here's a rough cut of an SQL script. You'll have to adjust the SectionID in the Categories record, and update the section and category both in the articles records. Notice that I used some pretty obviously standout numbers in the SQL.
The query for the articles will look something like:
update `jos_content` set `sectionid` = 7, `catid` = 11 where `sectionid` = 5999 and `catid` = 3999 - just substitute your sectionid and catid
Also included, a .zip of the images from the images/gallery folder. Just upload it to your site's images/gallery directory.
Hope this is helpful. YMMV, but I just used these files for this purpose, so it's been done at least once.
If someone wants to clean this up, maybe fix the couple of broken articles, maybe some better directions, feel free.