It would be difficult to establish a legitimate Stuart line nowadays in any case given the number of legitimate male descendants drying up even if religion had not been an issue.
Having exhausted the male line descending from James I and VI the principle of male preference primogeniture would then have had to go through the female line from James in any case. We would have missed out on George I and George II (perhaps not overall a bad thing 
) but otherwise would have pretty much ended up with what we have now (with a certain amount of regnal renumbering).
[B][COLOR="Red"][SIZE="1"]Reverend Earl Trefor the Sublunary of Kesslington under Ox, Venerable Lord Trefor the Unhyphenated of Much Bottom, Sir Trefor the Corpulent of Leighton in the Bucket, Viscount Mcclef the Portable of Kirkby Overblow.
Cymru, Yr Alban, Iwerddon, Cernyw, Ynys Manau a Lydaw am byth! Yng Nghiltiau Ynghyd!
(Wales, Scotland, Ireland, Cornwall, Isle of Man and Brittany forever - united in the Kilts!)[/SIZE][/COLOR][/B]
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