Well, IMHO, cause I'm both somewhat versed in photography as well as Photoshop, it looks like you'll need to find some way to use flash to get what you want (instead of relying on Photoshop). For one thing, you're exposure is going to be too long to use natural light and any movement will be blurred (the tripod doesn't stop the fish...wink). If it were me, I'd look at 2 possibilities: (1) putting some angle on the flash to glass and see if the glare problem gets cured. or (2) take a light reading and get your camera exposure set for the electrical lighting in the room so that you can come into the room at night, flip the switch and click the camera (before everyone gets too startled). Looking at your camera, though, there appears to be no manual exposure settings (and no 2400 ISO setting according to the HP site). If you MUST have a head-on shot, then you may have better luck fixing an angled shot in Photoshop (with the perspective tool) than fixing light. Good luck!