My istDL works with a R72 IR filter. I believe the K100 has the same chip, so it should be the same. Do a custom white balance as outlined in the manual and go from there. Be forewarned, the iso will need to be jacked up to 800 or 1600 AND use a tripod. typical daytime exposures I have encountered ar 1/30 sec @ f/5.6 at iso 1600. Of course, you probably already know this from your Oly shots. I usually do a B&W conversion in the camera, that way I have the original and the copy. The colors come out real funky orange most of the time, useless to me for "pictorial use. But I really do like the B&W effect. I usually massage the contrast even higher to print.
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