I have some spare CE1 loom plugs if you want to do this without cutting your existing loom.
However I would recommend swapping the car to CE2 if you can, does make the conversion easier in the end.
-J
Nice. That original guide was the one I wrote! Glad to see people are still using it!! By the way, 12v LEDs just have the resistor built in. They are a bit limited in colour range. -J
There is a FAQ for this annoying part: http://www.vr6oc.com/forum/topic/19232-obd2-pcv-inlet-valve-common-fault-info-4-u/#entry178782 But I think you will fail the MOT with it breathing to air. You can put in a small filter, but you need to block the inlet side. -J