I just bought the Humble Indie Bundle V and I installed the games direct from the downloaded exe's. Today I noticed that there are Steam codes for all of these, which is pretty awesome. However, after activating my Steam codes, it doesn't acknolwedge that the games are already installed. I added them as non-Steam games, hoping it'd recognize that these games were some of the same ones already in my library but no dice. Do I just have to uninstall them all?
A quick search yields this. In particular, the last answer might help you:
As far as what I'm asking about, it isn't the account I'm trying to associate, it's the software. I'm wondering if there is a way to get the Steam program to acknowledge my copy of STO that was not installed through Steam short of the 'Add Non-Steam Game' option or reinstalling via Steam, since I also have it through Steam now.
You can start the install in steam, then stop the download, close steam completely, copy or move the STO folders into the steam directory. Finally launch steam and validate files for STO, steam should recognise everything, it might download a file or 2 but it won't be much.
Thats what I did for the steam version of Fallout 3 goty and everything went smoothly (had the base game only and bought the package on sale for a few bucks, copied the FO3 files to steam and verified, saved myself a few hours download and have all the usual steam features as a bonus).
I suppose it can't hurt to try.