Engine Swap Question

i gotta friend who just bought a 94 525i Auto and was wonderin if its possible to swap the 540 engine wit the automatic transmission in favor of the 2.5L. i told him its pointless. but wat do u guys think bout it. im sure its possible wit alot of money, but he dont got it. wat kind of work is required and if u guys no anyone in the Tri State (NJ,NY,CONN,) area who specializes in BMW. or in Pennslyvania.

BRI, all swaps for BMW's in the tri-state.
Prices aren't cheap:-) (http://boykinracing.us/index2.htm)