recently removed my intake manifold on my m44 and its pretty simple although to get the wiring out of the way i had to cut up the junction box to be able to thread all the wiring through the lower intake manifold
the fuel rail comes off easy enough just disconnect the battery and have a rag ready for when you remove the hard line! does the m42 have the valve on top of the fuel rail to relieve the pressure?
also i would recommend having some new orings for the fuel hardline and for the injectors before you attempt it incase yours are perished and a new intake manifold gasket!
all my pics of me doing mine are in here!
http://www.318ti.org/forum/showthrea...440#post305440