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Hi there, thanks for your answer! I did find out what it was, using (ahem) another message board (Empire film magazine). Turns out I was right about it all, apart from Android Heaven, which didn't exist. Which I think shows incredible memory power! Or maybe not...
Anyway, the name of the film was "Slipstream", starring Mark Hamill and oddly, Ben Kingsley. So, there you go. Bit of a shame about there being no android heaven - it was a rich man's house instead. Why I thought it was heaven, I have no idea - maybe it's the capitalist in me sneaking out...