To all those attempting this modification. If you're going to make your own replacement battery pack, one of the parts not easily visible in the original battery pack is a PTC resettable fuse. It's spot welded between two of the battery terminals, and looks like one of the tabs welded to all of the other cells, with the exception of a white band around the center and some markings on it. I'd post the schematics, but they differ based on production date. Just remember that it's a simple series circuit. I strongly advise you to use the fuse. It's cheap insurance in the event of a failure of the charging circuit. Exploding Nimh cells will make a mess of your remote.

Dave, nothing personal, sure your battery pack is relatively cheap, but when you charge $25 to ship that tiny little thing to Canada, all of sudden the cost balloons to $55 without factoring in the tax, etc. I'm not aware of your shipping charges elsewhere, but the total cost for this project would be in the $10 range, provided you have an original battery pack to cannibalize.