I don't know if you really need to worry about the flex disc, I did mine without and no ill effects.

I would recommend borrowing/renting a hoist. On mine I just undid the allen bolt that holds the bottom of the engine mounts to the front cross member and lifted away (Of course checking to make sure nothing is going to bind or be damaged, ie radiator hoses, exhaust system, electrical connections, ect.) There is only so much room to lift before the trans will run into the trans tunnel.

How long did she let the motor run after Mr. Toads wild ride?

Tinker