Whereabouts are you?
The gearbox mount is dead easy:
1. Put a trolley jack under the end of the gearbox, and raise it just enough to support the weight of the box for now.
2. Remove headertank from its mountings, it will either pop straght out, or if its the round type you'll need to remove the plastic trim & 2 nuts/studs, then place it out of the way (no need to disconnect any pipes or anything, theres enough slack to just move it elsewhere)
3. Undo the large centre bolt through the centre of the gearbox mounting, and the 2 smaller bolts holding the mount to the subframe.
4. Remove the gear linkages with the plastic end caps from the bracket bolted to the gearbox. Be carefull with these as the ends like to shear off. Then remove the bracket, I've highlighted 2 of the required bolts here, and you can see where the plastic linkages connect:

5. Now jack the gearbox up as far as it will go, take it slowly as the end of the box will eventually hit the passenger side chassis leg
6. The bottom bracket you unbolted earlier should fall out, if not you missed a bolt

Remove this and set to one side. You will now have just enough room to whip out the old mount and slot in the replacement
7. Refitting is the reverse of removal
