I haven't seen any write-ups, but you'll need to drop the battery connection off and relieve the pressure in the hpfp. There are rail pipes above the manifold, so they need to be loosened off on their clips (not disconnected!). Access can be gained from the rightside gap in the intake manifold from above and from the side if you loosen off the DV. When fitting the valve, be careful not to crossthread it and ensure it is as tight as you can get it, as it WILL leak if given the chance. Put the battery back on after fitting and prime the pump BEFORE refitting all the loosened ancilliaries as there is nothing worse than getting a leak and having all the bits bolted back in place.
Note... when unscrewing the old valve/screwing in the new valve, the valve is at around a 10 degree angle to horizontal and is a complete PITA.
