The various geographical releases actually have different copy protection schemes. The earlier US release uses SecuROM 5, but the later European and Australian releases (both prepatched to v1.2) come with the much stronger StarForce 3 protection. The latter installs hidden drivers that won't be removed when uninstalled, and can cause conflicts with USB memory drives.
Argon Prime is the major city on the Argon planet in the X² universe. The Light Works provided models and data for the realtime in-game cutscene featuring Argon Prime.