Yes, it absolutely is. I rarely use the CS HUD. Just use the CS weapons popup to arm and the select desired weapon, while you are there, match the radar range setting to your AS range setting. Guns will work fine and the default settings are actually close to the AS reticule. For missiles it will be a hit or miss issue, the CS IR tone is still INOP for some reason, but the Radar lock will basically track whatever is in the nose cone. Use the AS procedure for target lock and acquisition, and when you get the red locked indication and are in the target acquisition cone, squeeze the trigger. as long as you don't have multiple targets in the cone the CS missiles should track the correct one.

BTW, the AS HUD is collimated incorrectly. It is too low, but AS hid their alignment code so you can't correct it. The CS is collimated correctly with the screen center point, so if you try to overlay CS on AS, you end up with an odd targeting parallax.

--Dan