Norton Password Manager Vault Custom Icons

I'm setting up my vault and with some websites such as Twitter, Facebook, MSN, etc, each password listing has the specific icon for those websites, with many of them however only the first two letters are shown in a circle.  This gets annoying so I was wondering if there is anyway to attach a custom icon to an entry.  If not, this would be a wonderful upgrade to add in the future.

There is no way to add a custom icon. I'm not sure how the sites that do show an icon are assigned that icon. Is it coded by Norton, or somehow picked up by some code on those web sites.

Maybe others here know how the icons get assigned. 

PS I'll ask this thread be moved to the Product Suggestions board.