i had looked at fitting them myself but ended up getting just getting it done at same time as service. Quite a few have fitted them themselves, quite a few posts on SELOC about them.
I believe the rear mount is pretty straightforward to change but the forward mount is a bit more awkward. This was confirmed by the time quoted by murrays for labour time for rear mount in comparison to the front mount thats between the engine and bulkhead.
This seems like quite a good guide:
http://www.trackhq.com/inserts/install.htm
and one of the threads on SELOC talking about them
http://forums.seloc.org/viewthread.php? ... pid4704126
Think you have to be careful with the front mount as it threads directly to the engine.
Kev
Edited: As just had a look at what I had wrote which was wrong, had been talking about 4 mounts when there is only two (front and rear), there are 4 inserts however, two for each mount
