I'm bringing this thread back from 2015 in the hopes that others are going through this transition nearly a decade later from Modo 17 to Blender 4.x. I've been using Blender for a couple of weeks, focusing on low-poly modeling and scene organization.
Call of Duty 4 has a new patch 1.6 with a 4 new maps - Creek,Broadcast,Chinatown,Killhouse. http://www.nzone.com/object/nzone_callofduty4_downloads.html
Crawling back to the forums nearly 4 years later since I initially posted the question to re-ask if this had become available for use in the meantime by any chance? The "cut 'n' stitch" dynamic here is just wonderful and would save a lot of manual work. Fingers crossed!