Add shipping method name and costs to cart module

[prema]

Hi there,

I'm using VM 2.0 with Joomla 1.7.3.
The Shop is almost ready, just i need to add to the shopping cart module the shipping name and cost. Now the shipping cost is calculated in the total price, but it looks strange, that the product price is 1$, and then the total is 1,2$. How can i do this?

The shipping looks now like this: 1-3 products the sipping costs is the same. Up from 4 products, the shipping is for free.
Because I'm not a genius, i could apply this only with weight. Every product has a weight of 1 gram, and then i was creating 2 shipping method. 1 is for 1-3 gram, this costs x $. And the 2. is up from 4 gram (the shipping cost is 0). Maybe it's not the best solution, but i was searching a lot, and i didn't find nothing. 

I hope somebody can help me.
Thanks!
P.