[ic] Can't get SeparateItems to work in 4.7.7

[Admin Account]

I can't get multiple quantities of the same item to display as separate
lines in cart or checkout.

I have SeparateItems    yes in catalog.cfg

I egrep -r 'mv_separate_items' * from catalog root and no found results.

I tried adding <INPUT TYPE=hidden NAME=mv_separate_items VALUE="1"> to
checkout and flypage with no results.

What am I missing?

Thanks, as always