I've begun cross referencing the windows dlls in a 'map' format as Dan Kegel suggested. I'm not finished yet because it seems when I sort alphabetically I am sorting the entire path. Sample output is here: http://home.ptd.net/~compsol/winxp_sample_map.html Be aware though this HTML is around 900K. If anyone has comments or suggestions on how to improve it or the next logical step please let me know.