🚀 go-pugleaf

I have the GNU Win32 files and installed them into /usr/ as the readme at the website said.  When 
I try to compile some of my C files using gcc.exe, I get the following messages:

H:\USR\BIN\GCC.EXE: installation problem, cannot exec `cpp': No such file or directory
H:\USR\BIN\GCC.EXE: Internal compiler error: program cpp got fatal signal 127

When I run cpp.exe I get the following messages:

sieve.c:6: stdio.h: No such file or directory
sieve.c:7: conio.h: No such file or directory
sieve.c:8: stdlib.h: No such file or directory
sieve.c:9: ctype.h: No such file or directory

I get similar messages when I try to compile the include demo programs.

I unpacked the files to h:\usr\ and used the directory names.  I am using Windows 95 on an IBM 
PS/1 486DX2 w/8MB and my environment includes the following:

C_INCLUDE_PATH=H:\USR\INCLUDE
CPLUS_INCLUDE_PATH=H:\USR\INCLUDE
PATH=C:\WINDOWS;C:\WINDOWS\COMMAND;C:\;C:\DOS;C:\NOR;H:\USR\BIN;C:\UTILS;H:\TOOLS;C:\GDS;D:\LANG\A86;C:\SBPRO;D:\LANG\TP;C:\MCAFEE;D:\LANG\TCLITE\BIN;D:\LANG\C6\BIN;D:\GAMES;C:\PS1TOOLS;C:\DM;D:\LANG\DASM;D:\LANG\QC25\BIN;D:\ALDUS;D:\LANG\ASM;C:\VIDEO;D:\MSIMEV60;D:\MSOFFICE\WINWORD

Do I need a configuration file or do some thing else?

Any help will be appreciated.
Jas'n Quartarone