tried it both ways and i thought taking it out the bottom was FAR easier, but up to you i guess.
From memory, so i'll miss out some bits!
1) disconnect all wiring from engine
2)Disconnect steering column from rack
3) disconnect PAS pipes at tank
4) Disconnect rear propshaft
5)unbolt gearbox from inside the car
6)Undo ARB from chasiss
7)Unbold gearbox cradle
8)undo suspension from strut tops
And basically if you use and engine hoist onto the front of the car you can lift the car up and roll/drag the remains out.
BUT may I suggest that you put up a seperate thread asking if there is anyone local to you that has done this before as you'll get alot of good guideance and it will be alot quicker under the instruction of a knowledgeable person