Yes, people here have done the re-stringing. If I recall correctly, they've said it's not TOO hard. Personally, although I've done re-wigging, and re-stuffing, and a few other things, I wouldn't try the re-stringing. I'd be afraid of messing her up, and having 6 pieces of a doll laying around, even for just a few days.

I would guess that if you messed it up, you'd just have the restart. After taking out (do you cut?) the strings, you just have to put in new ones. At the very least, if you cut the old ones out and couldn't get the new ones in right, you could send the doll's pieces to the AG hospital, and (for a fee) they'd fix her up for you.