What about a combination of both??
Use the jack just rise the engine and then the engine support to hold it and remove the jack. This way the stress over the oil pan is there just for a few minutes and you have extra space under the car once you remove the jack.
This is just an idea... lets see what others say
Maybe replacing the mounts is too fast and all this work is unnecessary and maybe you will need to be able to move the engine up and down to place the new mounts in place.
Last edited by Mau330i; 04-30-2012 at 08:40 PM.