I've built a small tool that allows to look through screenshots of co-op chambers.
For each screenshot it provides:
- course name,- chamber number,- the map name which can be copied to clipboard
Can be found here:
http://megaswf.com/serve/1111662 Flash, 4 mb
Works in the steam-overlay browser.

A screenshot:
http://img36.imageshack.us/img36/9916/adobeflashplayer1020110.png

Criticism, feedback, feature-requests are welcome!
I can add singleplayer maps too if there is a demand for it.

Will be really helpful, thanks mang.

add this for single player maps too and you will be 100%Win