Personally I'd settle for copies of Arena and Daggerfall that don't need me to beat windows into submission to get them to work. As for combining them, why?
Daggerfall: http://theelderscrolls.wiwiland.net/?title=Daggerfall_:_DaggerfallSetup_EN
It installs the game with a pre-configured DOSBox, and provides shortcuts to simply launch the game. Also includes some patches, mods, and utilities (optional, IIRC).
There's a similar thing for Arena, but since it has the CD version of the game and Bethesda only released the floppy disk version for free, it's considered piracy and can't be linked.