2004 e46 318i m52 swap

I have a 2004 318i that I am wanting to put m52b25 into and i am wondering how hard this would be to do and what i might be needing to be able to do said swap, i have majority of the accessories there including the loom, ecu, maf sensor, engine mounts and ac adapter/connector. car is an automatic if that helps at all

Cheers in advance for any help!