//NJ, does the EVEL (English Votes for English Laws)process in Parliament, not deal with the West Lothian Question?//
No, because it doesn't work.
//"Scotland would beforced to join the Euro"
Bulgaria, Croatia, Czech Republic, Denmark, Hungary, Poland, Romania, Sweden and the UK.
"sign up to Schengen"
Albania, Andora, Armenia, Azerbaijan, Belarus, Bosnia & Herzegovina, Croatia, Cyprus, Georgia, Ireland, Kosovo, Macedonia, Moldova, Monaco, Montenegro, Romania, Russia, San Marino, Serbia, Turkey, Ukraine and the UK.//
A correction to the above is that Monaco is part of the Schengen Area. All new member nations of the EU are obliged to commit to join both Schengen and the euro. Bulgaria, Cyprus, Croatia and Romania are in that position as far as Schengen goes. Some existing members were given "opt outs" from those schemes when they were launched. They are said to be permanent opt-outs - as permanent as anything in the EU, that is (i.e permanent until the EU says otherwise). I'm not too sure what you mean by your list under Schengen as the majority of those countries are not EU members and so have nothing to do with your assertion.
an independent Scotland would have absolutely no chance of joining the EU any time soon. The five current official candidate nations have been negotiating entry for between ten and twenty years. These things take time.