[winGRASS] Finding no r3.mkdspf and r3.showdspf files in winGRASS 5.7

[amos gong]

Hello,
I have downloaded the Precompiled Binaries winGRASS 5.7 from this
site(http://grass.baylor.edu//grass57/binary/mswindows_cygwin/)  and
installed them following the instruction from this
site(http://grass.baylor.edu//grass57/binary/mswindows_cygwin/cygwin_grass.html).
After the installation was completed ,I wanted to try out the sample
data set named "3D weather
situation"(http://grass.baylor.edu//grid3d/grass5grid3d_sample.tar.gz)
in this page(http://grass.baylor.edu//grid3d/index.html#sample). But
when I used the "r3.mkdspf" command , bash output "command no found"
and I cannot find r3.mkdspf and r3.showdspf files anywhere.
Is there anyone can do me a favor?