Can you move a gallery from one server to another? Say, i have a gallery on www.blahblah.com/gallery, would i be able to move it to www.yahdayahda.com/gallery?
Yes.
* Backup your files: FTP-download your complete coppermine-folder to your hard drive
* use a tool like phpMyAdmin to get a dump (backup) of your mySQL database entries. More info here
* verify your backup is working: check if the mySQL-dump contains all data (open the zipped dump file and use a text editor to view it)
* on the new server: FTP-upload your coppermine-folder to the new server
* CHMOD the folder /albums to 755 or 777 (depending on your server config]
* restore the mySQL table by running the queries of the dump files you created in step 2
* test-drive your coppermine gallery - you should be done