My favorite site for downloading new missions/maps/mods is Hot SWAT Mods...
http://hot-swat-mods.com/index.php

(Yes, you have to sign up to download, sorry... thats the way most site are now-a-days.)

They just released a new map called Operation Apollo, it is a self install map/mission meaning it has it's own exe to install.

http://hot-swat-mods.com/modules.php...=getit&lid=751

A nicely done map, tested and approved by me (like I matter,lol) it's a 2 story hotel/motel... a great map for testing and learning your room entry's since theres about a dozen hotel rooms, and extra rooms, one with a hidden surprise, I won't ruin for you.

I posted about Operation Daybreak a couple of days ago, a nicely down single residence that has three levels, hot tubs, swimming pool etc ect... bigger then it looks. Nice 30 minute co-op map.

http://hot-swat-mods.com/modules.php...=getit&lid=747

SWAT uniform mod... not that great, ugly colors but good for squad control as a team element leader...

http://hot-swat-mods.com/modules.php...=getit&lid=745

Dark Water map... no co-op, so I don't bother...
http://www.hot-swat-mods.com/Maps/Da...rs_Install.exe

Black Water Tactical Training map
A very nicely done training map, supports ALL modes and must have the SS add-on... it has a nice cat walk to look down on and tons of training rooms... good for team training and/or video recording from high above.
http://hot-swat-mods.com/modules.php...=getit&lid=742

and finally... a number of custom mission/maps packs... I have the HSM pack which contains about a dozen very nicely down maps, and I had no problems with any of them.

http://hot-swat-mods.com/modules.php...wnloads&cid=47

Enjoy... I do.