first have you copied the install cd to your hard drive? if so where.
for me it was e:\root\win2kpro\i386 what you do next is
%path%\w2ksp4_en.exe /c:e:\root\win2kpro\
%path% = location where w2ksp4_en.exe is located (which is the sp4 file for english)
It seems the instructions are a little dated but they may also work.
good luck