Great question — answering as the UphillTech team:
This looks like it was originally filmed in 16:9. There was most definitely a Full Frame version (4:3 is sometimes written as 1.33) and a Widescreen version (2.35:1). According to this review about half-way down the page, the Widescreen version matched the theatrical presentation. If you google "Hitchhiker's guide 16:9" you will find a few torrents and online videos that have that title. Also, this version on Amazon claims to be both 16:9 and 2.35:1, so it may contain both versions. Lastly, this review of the blue-ray states it is "2.35:1 with letterbox bars at the top and bottom of the 16:9 frame". I'd suggest checking out some of the results of the Google search mentioned above to see if...
Full answer by Johnny Bones: https://movies.stackexchange.com/a/19325 (CC BY-SA 3.0).
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