Checking files back in?

[PCGirl12196]

We have a sub-template I have to update with a different graphic for the difference seasons. We have like a 100 pages that use this sub-template. When I download the whole site and change the sub-template, when I update the pages it takes effect but then I have to manually put all the files that used the sub-template back up on the server. Otherwise it looks like I have them all checked out. Is there a better way to check back in the pages I "edited"? We have several users who use contribute to edit these pages. Just seems like there should be an easier way.

Also Locked files. How on earth do you get rid of those pesky locked files?

Thanks all