It's easy to simulate working the wiring out:
Pull all of the wiring out of the Octavia and lay it neatly out on the floor
Drape it over yourself
Set light to half your hair whilst draped in the loom
Pull out the other half of your hair, still draped in the loom
Knock yourself out by battering yourself around the head, using only the Haynes manual for the Octavia
Actually what you need to do is get the right wiring diagram for your Golf. Get the correct year etc wiring diagram for the Octavia, then understand both, then strip the wiring out of the Octavia, strip it down and remove the unused wires, then power it up attached to the engine and other ancillaries, check for fault codes, then find the power feeds for the Golf loom and match them to the Octavia, find the gauge feeds from the Octavia and match to the Golf, get the ECU cracked so it doesn't need the key and clocks if you want, install new loom in Golf, on chocolate blocks to test, put motor in and make it start and run, pull motor out and loom out, finalise connections, replace all and start and run to test wiring finally, then pull and wrap and install everything else.
Should be done in a weekend.
