multiple option sets per product

Looking at MarketPress as an alternative to eShop - it certainly looks much simpler!

This is for a single site install with BuddyPress (not sure if that's relevant here tho)

I have products that have multiple option sets, for eg:

- main colour: red/blue/green - does not affect price
- highlight colour: white/black - does not affect price
- size: small/medium/large - does affect affect price

So you can have a small red with white highlight @100 or
a large green with black highlight @200

all of the same product.

How would I configure that?