I like Lee's suggestion the best, but failing that, you could try picking the lock.
http://www.lysator.liu.se/mit-guide/mit-guide.html
I've never tried it on an SVX, but the locks don't look particularly secure. Even if you can't do it yourself, a good locksmith would open it in no time.
If you don't have the patience for that then try pushing a stiff wire hook down between the roof and the door and use it to pull the driver's interior door handle.
Phil.