buy extra module

[facka]

 Hello, i'm new at VM , and i want to build a shop ( something like this:   http://www.flowersromania.net/r/flowers-baskets.php?prd=37&n=Basket%20of%20roses   )  , but i'm mostly interesed how can i add a module to the product delails that woul allow me to buy a second item with the purchase of other item ( the "Select size:" module , and "Add something special: " [ here i would like to add pictures for those itemes ] and the "mesage: "module ) . If any1 could think or know a module that allows me to do that i would greatly apreciate it . Thank you in advance.
P.S. Sory if i posted in the wrong place , pls move if necesary ; sory for bad english

[kodyxgen]

You don't need a module for that. Custom fileds is all you need.