Hey hey, just added a bunch of tracks a fellow NR2003 racer was having a hard time finding.
Uploaded tracks include:
Daytona 2006 v1.35
New Hampshire 2005
Phoenix 2006 Night (pictured above)
North Carolina 2008 (Day)
Watkins Glen 2007 V1.0
Head on over to the tracks page from the link bar above to download any of these tracks.