Before I installed a set of color corrected HD144 lenses on my BG808S I used a red gel filter taped over the CRT face. I did lose a little sharpness but achieved much better reds. The 808 is an AC unit but you may be able to rig up something similar on an LC pj. The gel filter was about $10 a sheet which I cut to size. A theatrical lighting store will have a variety of different shades to choose from, so buy a couple and see which look best. Take a look at the shade of green used in the Cine 9 to get a ball park idea.