RDE(Ruby Development Environment)

I'm using Delphi 7 and when trying to install the packages using pkg\rde.dpk and the following files are missing

heClasses.pas
heFountain.pas
heUtils.pas
heverdef.inc
HPropUtils.pas
HStreamUtils.pas

so I had to copy them from TEditor to the pkg directory.

Then I got an error
[Error] heUtils.pas(991): Undeclared identifier: 'rtBitmap' in heUtils.pas

I'm not sure what to do from this point. Is there any compiling documentation I can read or is it the fact that I'm using delphi 7 that's the problem?

Thanks
Dan