hi,
you try the following steps
1. copy item cat grp NORM to zorm
2. you maintain zorm -item cat grp for that perticular material in sales org2 view
3. copy tan to ztan
4.in ztan controls maintain special stock as "w"
4. do the item cat det as or-zorm-no usage- no Hlv- ztan
now you will get the result desired.
reward if helpful.