I know many people have used set 7938 Passenger Train to build a LEGO version of the Bombardier Talent EMU/DMU; here is mine. I didn't want to necro-post in one of the existing threads, but if I were to, I would have posted here, in cimddwc's thread as that is where I got most of my inspiration from as I was researching certain aspects of this train. My version differs in several ways though:
1. I wanted to keep the original train bases as part of my design (@cimddwc used a custom base to enable his doors to work)
2. I did develop an opening door, but to make it work with the train base I had to have part of the door stick out by 1.5 LDU which ruined the look of the overal consist, so I dropped that plan.
3. I didn't like the folded paper harmonica between the carriages in cimddwc's design, so I came up with a different Jacobs bogie design which makes the train look connected from front to back. Thanks to some sideways brackets there isn't even a gap!
Here are some pics and a video (on Flickr) showing the model in action. There is some wheel slippage, likely because some of the Jacobs bogie wheels are not rotating freely enough. I think I can fix that (either loosening them up a bit, or switching to ball bearings. or even adding a second motor into one of the bogies).
7938 as Bombardier Talent by Phil B, on Flickr
And the video: