I know in the past I've seen posts in here somewhere about adding extra/custom tabs, but I can't seem to locate them.

I'd like to have a tab of additional info called "Attribute Details" that i can use to give a detailed description of attributes listed for a specific product.

Ideally I'd like to keep it separate from the Description entry by having it served up in a separate tab either from a html doc or php doc.

Can someone point me to documentation for this?

Thanks!