Don't know about a thread, but...
1) Support the car on jackstands at the rear
2) Support the engine with a hydraulic jack and a fairly wide block of wood (to distribute the stress on the aluminum case)
3) You can either drop the entire engine bar, or unbolt it from the mounts, then raise the engine about an inch.
4) Replace the mounts (it takes a little patience and finagling to get your hands and tools in there, but it can be done) It may be easier at that point to unbolt the steel mount "holders" from the case, then install the new mounts in those, then bolt them back to the case.
5) Reattach the engine bar and bolt the bottom of the mounts back to it
6) Lower the engine and snug up the engine mounts
7) Remove jackstands and