Replying to Track dolly / Time Lapse technique

So recently I have seen both ski edits and other creative videos where people have panned/tilted/zoomed/etc. during a time lapse sequence. I know that some of these people use special electric dolly tracks to acquire this effect, but in the momentum ski edit session 2, the filmer also used this technique. He may have rigged up this advanced system on the ski hill but I really doubt it.

Momentum Session II 2010 from Momentum Ski Camps on Vimeo.

(watch from about 1:20 - 1:35).

So if anyone knows how to get this cool looking effect without a really expensive dolly track, please let me know!
Thanks.

Here is another excellent example of how this effect can change your filming...

Timescapes: "Death is the Road to Awe" from Tom Lowe @ Timescapes on Vimeo.