The dm_underpressureex.zip file you have requested: Maps / Deathmatch / Under Pressure (Extended) - 501.51kb is not available. Perhaps try browsing all files for the game Star Trek: Elite Force II and upload any files you want to share or are missing. This is the only information we could locate:
An extended version of the original under pressure map with duct work and access ways with grates that are penetrable by weapons. Much larger than the original and much more space to run around.