Kavelioc

I purchased CM:BS from Batlefront years ago, and recently activated it on Steam and downloaded there but the frame rate and graphics are terrible on Steam. Using the Steam version I have played through two missions of the campaign, and purchased the DLC through Steam, but Im so fed up with the quality Ive reinstalled the game from Battlefront and found it plays much better. My problem is how to transfer the Steam saved games to my desktop version (Ive found the Game Files and copied them to the folder i need to but they're not showing up in game) and how do I activate the DLC I bought through Steam? The Steam version doesn't have any CD keys as far as I can tell

I'm having real difficulty downloading the games I purchased a few years ago from the battlefront store. I've tried to download CMNB and CMRT but my computer says they'll take up to 11 hours and then fail after a few hours of downloading. I have a good download speed for anything else. Any help would be appreciated as I was thinking of buying Fire and Rubble, but won't if I can't download it