One thing is very helpful, if you need to get wire to other side of motherboard, you can pull the wires through the tiny vias the motherboards is full of.
Though you need about 0,15mm solid wire.
But the spots on the other side are often tiny vias too, so it's anyway good to use the tiny wire there.
Other thing what i've done, is to put little spots of hot glue where you would put wires to pass. Then when you start to pull the wires everywhere, just heat the tiny hot glue with soldering iron and put a wire in it.
My 2,5 cents
I'm installing FMCB in Finland. I'm installing modchips for PS2, Xbox360, Gamecube and Wii, in Finland. I live in Finland.
I love Finland. My country is Finland. I work in Finland. I was born in Finland.