How to create new thread size in SW2009 SP2.1

Like most designers, we have a need for threaded holes thataren't included in SW.

I have created the User-Defined Standard by copying the Ansi MetricToolbox standard. However, there seams to be no option for actuallyadding to, or editing for that matter, the contents. I have read acouple of posts referring to "clicking the '+' ", but there isnothing anywhere on the screen that even resembles a "+".

There are threads referring to this being a pre-SP2 bug, but we'reon SP2.1.

I have attached a screen shot for your review.

Thanks Much.SolidworksGeneral