yes you can find the upgrades at phpbb.com. For phpbb3.0.11 you wont use integramod. Go to http://phpbb.com or http://phpbbireland.com/kiss2/ and get Kiss Portal. For ease of updating install with automod and keep track of the order you install any mods
keep your Integramod forum and db intact so if you install phpBB Gallery mod you can import your albums.
You may also have to rebuild your subforum structure after the update