ok.. first off.. there is currently NO pc version of D3.. What you see is the SDK version. Now the SDK version comes without maps and with a locked .dll driver. This locked driver limits you to 3mb maps.
So If you buy the Pocket PC version of D3, then you have the maps..
If you install mine, or Ninja's Frontend you will have the SDK..
but you still need the .dll driver that will support over 3mb maps.. If you managed to download one of the early D3 frontends, then this did come with the .dll you require.
hope this clears some things up.