Floyd Rose trem on Squire Strat?

I am re-building my Squire Stratocaster as a project and want to fit a Floyd Rose Original Locking Tremolo bridge, does anyone know how to do it, I know the body needs routing out but how do I know exactly where to put the hole so the strings line up over the pickups. If anyone can do it for a price in the Derbyshire area please let me know.