Hi! My GT Lite can't select my hl2.exe in my CS:S folder, does it need to be Steam or Non-Steam? Because if you're saying that if a Non-Steam version is possible to be added in my games list, IT CAN'T!:(
I really want it to be in my games list really badly though, because my server master selects the server in the list I don't like! Thanks by the way !

That is correct. GT Lite requires a legitimate copy of the game. You can go to steam to acquire it.

So a "Non-Steam or a Stand-alone" is not allowed to be added even though I have hl2.exe??? Thanks !