I'm just wondering if I have a domain dev.blah.com and dev2.blah.com, if it should be possible to get wordpress/gallery installation up and running and configured at dev.blah.com, and then simply move the files/folders from dev to the dev2 folder? Are there any configuration changes that are needed? Any other suggestions if this is not possible?
If it's a One-Click install, you won't be able to upgrade it via One-Click after you've moved it. Other than that, Gallery has a config.php you'll need to check, and WordPress has some URLs in its Admin -> General Settings section.