Crop multiple pages in Preview on MacOSX

One of the best tips, I have ever seen on Macworld.com: Crop multiple pages in OS X 10.5’s Preview. Works in MacOSX 10.4, too! Now I can finally get rid of all the useless white borders in PDF documents, that make the PDF page unnecessarily big and forces you to scroll on most tiny screen more often. BTW: as ScottBayes mentioned: It may be worthwhile to select the Reduce File Size setting under Quartz Filter in the Save As... dialog to reduce the file size, too.