How are you getting the pictures out of Picasa and into the other
printing programs?

Try turning off auto crop in Qimage.

From the help file.

Note that when "Crop to Size" is turned on (scissors button depressed),
you have given Qimage permission to crop some of the image to force it
to fill the entire frame. Qimage will automatically default to cropping
out the exact center of the image. If you would like to crop a different
section of the image instead of accepting the default center cropping,
you can easily move the crop for each print using the cropping tool on
the page editor (see example 3a in the Learn by Example section) or even
create a multi-purpose crop that is placed on the image itself and
applies to multiple print sizes (see example 11 in the Learn by Example
section of the help).

Sel ....... :)

You are probably missing the fact that you are printing a different aspect
ratio than the original image is. So you have to either crop one side of
have white space on the short side. Qimage has a setting to select either.

Select the size tab in the right hand pane. Right above the tab is a
scissors button. Toggling this changes from autocropping  from "Crop to
Size" (button down) to "Fit in Frame" (button up). You want Fit in Frame.