They now have double sided tape for the perimeter of sheet vinyl flooring. Works great. I got mine at Home Depot. I used it in a recent remodel in the S&B bathroom. If you end up with a few bubbles don't sweat it, they'll settle down in about a months time. Good luck.
Oh yeah almost forgot. Unless your current floor has a rough textured pattern, you can lay it right over the top. If you think you need to, you can even buy floor leveling compound, skim it, then lay new floor. If your current floor has 100% glue down taking it up and cleaning the glue etc. could get ugly.
Carl
2007 National RV, Sea Breeze