I've been told that the file here doesn't work for Portal 2 anymore for some reason. It may have been an isolated incident.
Original post is under the spoiler tag.
||A single coop test chamber that requires at minimum 15(?) portals to complete.
A coop partner who has completed both the single player and the coop initiative is recommended.
Test chamber includes: aerial faith plate, button (untimed), redirection cube, hard light bridge, discouragement beam, and emancipation grids.
When completed, the map sends you back to the Hub. (Or, it should)
Installation instructions:
1. Create a folder in 'Portal 2\portal2\' called addons.
*If you have the Sixense MotionPack DLC, you will most likely have to create the folder in 'Portal 2\portal2_sixense.'
2. Place your .VPK file inside the addons folder.
3. If Portal 2 was running during step 2, type the following in the console: update_addon_paths. Otherwise, skip to the next step.
4. To load a Co-op map, start a Co-op game with your friend, once you enter the hub type in console: changelevel mymap replace mymap with the name of your map.
(EDIT: the name of the map is mp_coop_btmap1_rc should have specified earlier)
(EDIT2: Added a readme file with basic information)
File Name: btmap1_rc-8-2-11.zip
File Size: 1.64?MiB
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By the way, for future reference, double posting usually tends to incur the wrath of the forum gods - unless you need people to know there's been a new post, it's best to stick with an edit usually. Just thought I'd let you know.