1)when i hot swap to use Xbox HD maker, do i need to install some type of dashboard along with it?
The xboxHDM/ndure XBE exploit comes with unleashx. If you want to change it then copy the new dash files over to the E:/Dash directory (I haven't done gamesaves and am not sure if they are structured teh same way) The xbe exploit boots to the dash in that directory.
2)if so, what do you recommend?
I think XBMC. It can launch your apps the same as every other dash, has fan controls, looks the nicest (IMO), and I use my xbox1s almost exclusively as a media centers anyway. But it's personal preference.
3)does he dashboards come with additional programs, ie DVD2Xbox or commandx(i think that's the name)?
Not really. You're probably better off getting the latest version rather than some cobbled evox bundle anyway.