You will need to cut holes for the intercooler piping. If its a FMIC, you will need to do the normal things required to mount that.
If it comes with a tuneable ECU. Do this.
Get as much as you can off your friend.
Install injectors into your 25de
bolt on turbo manifold and turbo
pipe up the water and oil lines.
install intercooler
get your 25de+t tuned and drive it till it blows (if it ever blows), then when it does, you have a 25det motor spare.
25de+t's are bloody good!
read the green text below.