Hi, the V_Name2 and V_Desc2 fields are used for specifying the name and description of the version for the second language (in case multiple languages are enabled on your site).
You can import multiple versions by specifying the same category and product info. e.g
"Meat",,,"Sausages",,,,,,,,,,,,"Basingstokefurter",,,,"10"" multipack (10)",,,"10-bas-furt",2,0,1,0,0,"SausageFactory",,,
"Meat",,,"Sausages",,,,,,,,,,,,"Basingstokefurter",,,,"15"" multipack (10)",,,"15-bas-furt",2.65,0,1.5,0,0,"SausageFactory",,,
Notice that the two lines share the same category and product info. The data tool should automatically detect this and link both versions to the same product.