Can you make these two games available through Steam?
This is not likely to happen as they are already available as free downloads from http://www.eldercrolls.com
Both of these games require DOS emulation to play, and I believe that's not something Steam currently supports.
Yeah, Steam itself doesn't support any DOS emulation. But, there are several games on Steam that comes pre-configured with DOSBox, like http://store.steampowered.com/app/2280/ and http://store.steampowered.com/app/7760/. Although both these games are now using fairly old versions of DOSBox so it's better to do it yourself anyway.