To launch Project Texas dlc New Mexico is required. No more mods are required for it to work fine.
Project Texas is compatible with a majority of ATS map mods, such as:
REFORMA
GREAT AMERICA
PROJECT BETTER ARIZONA
PROMODS CANADA
ALASKA MAP MOD
MONTANA EXPANSION
SAN RAFAEL ADD-ON (upcoming our team map mod)
PACIFIC MAP
some other map mods
Compatibility for 1.46