Yes it looks awesome doesn't it? I would love to be able to make something like that, but I can't imagine the amount of man hours (and modelling skills!) that must have gone into it.
GREAT new resource for Epic. The same company, Hawk Wargames, has just released a series of downloadable card buildings, for free, to go alongside the release of the new Dropzone Commander game.
The buildings are 10mm scale, so it might be an idea to play around with the print size and perhaps make them a little smaller. The styles are pretty similar to the ones in the photos above, so I think should generally fit the 40k setting.
Link, with buildings as well as instructions: Dropzone Commander downloadable card buildings