how do you look at them? where do they get stored for css?

should be in C:\Program Files\Steam\Steamapps\your account name\Counter Strike Source\Cstrike\Screenshots

should be in C:\Program Files\Steam\Steamapps\your account name\Counter Strike Source\Cstrike\Screenshots

 

No.

 

C:\Program Files\Steam\Steamapps\your account name\Counter Strike Source\Cstrike\de_dust2

 

or the map that the screen shot was made at.

are they the mdmp files?

I can get your screenshots for you if you want. Tell me your account information