Thanks for your reply which WAS appreciated very much (and solved my issue), and humble apologies for completely overlooking to respond!
Is perhaps putting an "r" in front of strings new to Arcpython under version 10? I don't recall this from 9.3, and it doesn't seem to be in my sample scripts from then.
Perhaps I need a refresher to update myself to the latest code!
Similarly, I haven't struck the 'shutil' module before, but my 9.3 copy methods don't seem to work. Couldn't get this to workk yet either - so I just manually copied the file - but I'll get back to that when there's time!
Thanks again
Steve