automatically assign 2 shopper groups to all products?

[kalelreturns]

I use CSV advanced to import my products, the only problem I have is that I can only choose one shopper group per product when I import them. I have searched for bulk editor plugins, but can't find any that lets me bulk edit shopper groups. I can't manually edit them because I have 1000's of products. Is there any way I can add a script or something to automatically assign 2 shopper groups to all products?