Then, you can recompile IWData.res, using the .rc file generated by Resource Hacker, using Delphi's own resource compiler (brcc32.exe, in BDS 2006). Copy the recompiled IWData.res to the IW dcu folder replacing the original file (backup the original FIRST!), and you are ready to go!
You will have a faster IW application and as an extra bonus your ISAPI DLL will be 170 KB smaller! :-)