I just recently installed GD on two of my linux boxes. It seems mostlikely you need to install libpng, zlib, gd and then the perl GD package. I found it much easier, on linux, just to download the source of all these, and build them directly (total takes about 5 minutes once downloaded). On win32 with ActiveX just do: "ppm install http://theoryx5.uwinnipeg.ca/ppms/GD.ppd"