Ignition kill switch

[MadCat52]

Went to start the 7 the other day after more than 3 months standing.  Fired up first time, but the mechanical sympathy in me winced as the first 5 seconds or so the engine ran without any lubrication until the oil pressure came up to spec.

I'd like to fit an ignition kill switch I can operate inside the car that allows me to crank the engine until the oil pressure reaches operating standard before firing.

Anyone else done this?  I'd like to know which wires to run where.  Car is 2005 1.8K series with MEMS 3.

Cheers

Bob