bbqjeanvaljean,
Mind me asking, you use version 10 of what? Are we talking about the same thing?
Only version 9 of VFP is out, and I can't really say anything on it's report designer as of yet.
Powerprinting wanted to shade every second line in the report gray (zebra report). This doesn't necessarily require a picture, just a shape with no borders on the background. Is this what you want? Or you can do it with a picture, or alternating pictures, as MikeLewis suggested.
As for "Print When", if you right-click on any element of the report, then select "Properties" from that menu, you will see a "Print When" button there. An expression there can cause that element to be printed under that condition, or skipped otherwise.