the Besançon Galactic disk population model of the 1.42 deg$^2$ CCCP exposure of the Carina Nebula region predicts $\sim200,000$ foreground (distance $< 2.3$ kpc) MS stars in the following mass distribution: 4,000 F stars, 10,000 G stars, 20,000 K stars, and 170,000 M stars. About 1,000 foreground giants are present. Behind the cloud at distances $2.3-5.0$ kpc, the model predicts $\sim930,000$ background stars: 30,000 F stars, 77,000 G stars, 180,000 K stars, 630,000 M stars, and 9,000 giants. The vast majority of these stars are undetectable in the CCCP X-ray exposures. This is expected from the appearance of star forming regions at distances around $1-3$ kpc in different wavebands: infrared images are typically dominated by dense populations of field stars, while X-ray images are dominated by PMS stars in the young clusters.

A typical Monte Carlo run predicts $\sim1800$ foreground and $\sim900$ background field stars will be detected in the X-ray survey. The foreground detections include: 150 F stars, 450 G stars, 150 K stars, 850 M stars, and 150 giants. Approximately 20%, 50%, and 30% of the simulated foreground detections have distances from the Sun in the ranges $< 0.5$ kpc, $0.5-1.5$ kpc, and $1.5-2.3$ kpc, respectively. The background 