If it is Collateral what about Antonio Pinto's quite substantial contribution?
His contribution was 22 Minutes or so and some of it is already on the regular soundtrack release.
This definitely should just be JNH's album alone since he did get the full main billing despite the fact like Elliot Goldenthal (Heat, Public Enemies), John Murphy and Klaus Badelt (Miami Vice), Lisa Gerrard and Pieter Bourke (The Insider), Michel Rubini (Manhunter) and most recently, Harry Gregson Williams (Blackhat), Mann has always had main composers' music tampered with or almost completely jettisoned in his films despite the fact that scores that were originally written were solid enough to keep. The Insider and Miami Vice are debatable. Manhunter and Heat probably have the best use of score and pre-existing music. I'd also put Collateral there with Manhunter and Heat in the same use to a point. The only Michael Mann films that have really featured a complete whole score for have been Thief, The Keep and The Last of the Mohicans, despite the use of two composers. He's almost exactly like Terrance Malick in that exact same way, who's also done that to composers like Hans Zimmer, James Horner and Alexandre Desplat.
Howard deserved his own score album then (2004) and deserves one now.