Just leave the tortoise sitting in water. It won't hurt her. Much easier that way. Just a small bin with an inch or so of water in the bottom. The longer this stays out, the harder it is for the vet to push it back inside. So as soon as you can get her to the vet, do it.
If you use a CHE (ceramic heat emitter), just position it over one end of the bin and leave the tortoise there, in the water, overnight. Just make sure you're not cooking her with the CHE
Here's another option using plastic food wrap:
http://www.tortoisetrust.org/articles/prolapse.htm
i saw the food wrap and dont really want to do that in case I hurt her, as for the water fab idea I shall see if I can keep the water warm with the heat bulb so she doesn't get cold then I can sleep