the following assumes gvim 6.0 or 6.1 , dos or unix

copy syntax/filepro.vim to $VIM/syntax/
on unix strip out the carriage returns along the way

  unix: cat filepro.vim |tr -d "\r" >/usr/local/share/vim/vim61/syntax/filepro.vim
  win:  copy filepro.vim c:\vim\vim60\syntax

insert the following lines into $VIM/filetype.vim

  " filePro Processing Table
  au BufNewFile,BufRead *.prc,prc.*,*/prc.*       setf filepro

(this file name pattern matches both unix and dos/win filepro files because vim is available on both platforms)

open $VIM/menu.vim in a text editor
look for these two lines, or the closest match to this part of the file, there is no garuntee these exact lines will be present, but lines like this will be:

  an 50.30.180 &Syntax.EFG.Exports :cal SetSyn("exports")<CR>
  an 50.30.200 &Syntax.EFG.Focus\ Executable :cal SetSyn("focexec")<CR>

insert the middle line shown below:

  an 50.30.180 &Syntax.EFG.Exports :cal SetSyn("exports")<CR>
  an 50.30.190 &Syntax.EFG.filePro\ Processing\ Table :cal SetSyn("filepro")<CR>
  an 50.30.200 &Syntax.EFG.Focus\ Executable :cal SetSyn("focexec")<CR>

copy ftplugin/filepro.vim to $VIM/ftplugin/
as with the syntax file, this is a dos file so if you are on unix you must strip out the ^M's
  cat ftplugin/filepro.vim |tr -d "\r" >$VIM/ftplugin/filepro.vim


now you can load any filepro prc.* or *.prc in vim and they come up syntax hilighted.