If you are updating from the previous version of the Custom Map Pack, you can download this patch to update only the maps that have been updated.
To install, just drop the levels folder into your Heat of Battle directory!
Please see the installation article for more details.
Holy ****! Nice job man thanks! Merry Christmas bro!
Edit: It says files not available now, try again in 5 minutes. Servers must be getting hammered Christmas night in the US.