Hmmmm...if you want more control over it, I'd go for a little bit of compositing/layering postwork. I'd take Brian's idea, but extend it by using a polarizing filter. Would go something like taking 2 photos. One with the polarizing filter minimizing/eliminating the reflection and the second with the reflection. I'd recommend a tripod too. Then, bring the two photos into photoshop within the same window, the one with reflection on top, and play with the opacity and possibly blending modes of the top (reflection) layer. If you don't want to do any postwork like that, then still get a nice polarizing filter. It's not an all or nothing filter. You can control how much reflection you get based on the rotation of the filter and your angle to the glass. -=>Donald