When I opt for checking all available group packages during installation it didn't install everything indeed, well, almost everything.
Launch YAST2 modules -> Software -> Install or Remove Software and you will see some more available rpms.
It seems that you cannot install everything in SuSe because some packages will conflict with others. Load other CDs and see if there are more packages available (some are codes, srpms, docs, kernels, etc.).
It comes with manuals so check there for the packages you want.
Have a lot of fun :-)