The DP4 installation program does not add the location of DP4 programs to the path, as this is not required for running from the Start Menu. However you may find it useful to add the location of DP4 programs to the path.
DP4 programs are run just by clicking their icons. To be able to run them from the Run option of the File or Start menu without including the full pathname, set the PATH environment variable as follows:
Using a text editor, add the directory containing the DP4 Windows programs to the PATH defined in your AUTOEXEC.BAT file. If you accepted the default directory assignment for the Windows programs, the PATH statement takes the form:
path other_directories;c:\dp4\win
After changing AUTOEXEC.BAT you must restart your PC for the changes to take effect, except when running from a command prompt. However there is a utility called WINSET which can be used to change the master environment. This is available in the Windows 95 Resource Kit.
On Windows Me AUTOEXEC.BAT is not used (unless you hack the operating system), but if you edit AUTOEXEC.BAT the changes are put into the registry. Simply copying on a new copy of AUTOEXEC.BAT may not work.