According to REALOEM for a '07 328xi with N52...
You already have coolant inlet pipe 11537516414. That's great news, because it's behind the front exhaust manifold and was a huge pain to swap...as I had to loosen the manifold to get to it and was still next to impossible to put the new one in.
You currently have hose 17127540020 running between that pipe and the "low temperature cooling module." You'll replace it with hose 11537522999, which has a T fitting in the middle of it. You won't have to touch the lines going to the trans cooler...which you have correctly identified.
To show it differently, you are subtracting part 28 in this diagram:
http://www.realoem.com/bmw/enUS/show...diagId=17_0700
You are adding part 12 in this diagram:
http://www.realoem.com/bmw/enUS/show...diagId=11_3755
So yes, my research agrees with yours. I re-used my mounting bolts. They are aluminum, but they weren't highly torqued and so I can't imagine they were torque to yield. They just hold the housing to the head enough to compress the rubber seal. Aside from that, you'll need a $1 hose clamp to hold the new hose and the oil cooler. Gasket 11427525335 goes between the housing and the oil cooler. Gasket 11427537293 goes between the head and the housing. I think the set can be had for less than $20 on ebay or amazon. I was due for a coolant flush and oil change at the same time, so I did a thorough parts clean/wash of the heat exchanger internals before adding it to my car.