if you haven't installed floating point/no-data upgrade yet,
you need to get only 2 files:
fp_main.tar.Z
and 
fp_alpha.tar.Z
Uncompress these files, move fp_,main.tar into src directory
issue tar -xvf fp_main.tar command. Do the same for fp_alpha.tar in
src.alpha directory.
Remove all the .o files and run GISGEN to recompile GRASS.

if you have installed the upgrade before, get only the updates you haven't 
installed yet.

Olga (olga@diego.cecer.army.mil)