gnuplot3d - how to get it to work

[Mr. Mingzuo Shen]

Hello:

    I just heard that there is a gnuplot3d patch.
I FTPed the patch files but I do not know
how to "apply the patch". I see the diffs files
but I do not know what to do to 
make use of it (I have read that there is some program
that can do this). I would appreciate some help!

    Or, better yet, I would prefer a patched 
gnuplot with contour and other 3D capabilities
(and a new Makefile for DECstation 3100). I
will only need PostScript output (and I have my own
patches to the PostScript driver). 

    Thanks in advance for any help (I tried to read the diff
man pages).

Sincerely,
Mingzuo Shen