Crazy that I've stumbled across this thread.
been researching for a while now and I'm almost ready to start the conversion myself.
I have a 03 plate fiesta and engine mount to suit the 1.8 engine.
only difference is I was going to strip whole fiesta and just put focus clocks and dash loom into fez.
as like you my electrical knowledge is slim so I was planning on cutting and twisting (done properly) all lights and what ever else I could to work with fiesta stuff.