yea the pipe that comes off the ecu goes to the inlet manifold, its the pipe you plumb your boost gauge and dump valve into, and as long as youve got every thing and theyre all the right bits and 13,15,17mm spaners its pretty stright forward.
The worst bit is swapping the loom and if youve got a rst loom its easy coz you dont need to cut any thing, (and i found it was quicker to strip the whole interior out coz theres wires for the hand brake, fuel gauge and the fuel pump that run under there) but still take you time with it and make sure you get it right, coz if you dont you'll be there for ages trying to find the fault and in the end it'll be some thing silly (I know i wired the starter motor up wrong and luckily it was the first thing i checked)
And its pretty stright forward, you need to drill some holes to mount the ecu's, fuel filter and mettering head, the fuel lines need modding, i'm still using the standard xr fuel pump and tank so they dont need swapping (unless its efi)
Hope this little lot helps ya