Ok, they are not too bad to do.
For the top engine mount you'll have suport the engine to remove. Take the undertray off and suport carefully from the sump (use a block of wood and be carefull the sump is ally so don't force it too much!!). You'll also notice that the shaft on the Vibratechnics mount is round instead of square were it picks up the engine bracke - don't worry once is tighened up it's not going anywere!! Other than that, the top engine mount is easy.
The top gearbox mount is also fairly easy, but you'll need to remove the airbox, battery and it's tray, so takes up a bit more time. Also the bolts that hold the vibratechnics mount to the tray are supposed go throught the other way around to the std mount.
As long as you know one end of a spanner from the other you'll be ok.