Is this the folder w/ the files that you set to read only?

 

C:\Program Files\Steam\config

No, it's probably in some directory like:

 

steamapps\account\day of defeat source\dod

 

I don't have source so I don't know the exact directory, but it should be close to that. You're looking for a config.cfg file by the way.

thanks

Should be no ill effects for searching your Valve folder for .cfgs and read-onlyinating them all.