Grouping

In autocad 2002 LT I created a button to group and ungroup the seclection.
One click and the selections were grouped together.
Since migrating to 2004 I have not been able to do this, and the macro is
not supported for the shortcut.
Can anyone point me in the right direction.
The macros used were
GROUP
^C^C_pkstgroup;*;
UNGROUP
^C^C__qkungroup
many thanks