Some questions on virtuemart

[bartlebi]

Hello. Would like to do:
1. Change default measurement of unit to piece and litres (now i have only kilograms, grams, litres etc). There is no "piece". But some goods will be in kilogramms and grams and i can't just change language file.
2. Where i have measurement in gramms, i would like to do next: Have some goods like this:
1 piece of cola costs 1 dollar, but you can buy only 1 pack where 6 cola inside and your end price will be 6 dollars + some taxes.
And second type of good where you can buy 1 big box with 6 pack inside (in every 6 cola, 36 pieces at all) and it will costs 30 usd.
How can i do this?

Thank you.

[K&K media production]

On Tab Product Status you can add quantity steps to your product ... so you can add here 6 and your customer must by 6,12,18 ...