Right here's what I've learnt.
But needs confirmation.
Folding mirrors stay live but not permanently except with key on, so if you want to have power windows that stay on after ignition off (albeit from between 5 and 30 mins at a total guess until i find out) then all you need to do is bridge the 2 relevant relays at the low voltage side, shouldn't cause any harm as it is no load (except relay solenoid) you can use a comparator relay or something similar if you don't trust me, this will use a pulse rather than load to switch the relay.
To get folding mirrors you need to bridge these 2 wires (ground i think but needs confirming).
(Snatched from the web)
It's off a mk3 Mondeo with folding mirrors and I'm assuming that the switch wiring is the same but i need to confirm by doing a continuity test with my multimeter.
On my custom diagram i have permanently hot and also accessory delay relay but i can't find any info on it but i think it means a delayed power down
If so it sounds like what we need for windows.
You can also buy a hella timer relay 4 pin but they aren't cheap
.
Back to mirrors, so to bridge the 2 pins we can take a double lock signal from the driver door lock which we link to a relay either live low or negative low, load side just goes to the mirror switch to link those 2 pins, so when double locking the van it'll tell the mirrors to fold, will have to rig up something similar to the unlock door to also actuate the relay but have to be careful not to have any conflicting connections for lock/unlock.
Simples
There may be an easier solution than above but until someone let's us in on it this is all i got
Also need to see if the mirrors stay dread when you remote unlock the van if so it means for now they will need to beer manually unfolded after you get in and insert the key, there are plenty of solutions to overcome this but for now I'll leave that.
If allcock was here we'd be up and running by now with a series of ropes and pulleys
Anyway I'll have a look when i can