thanks for the reply

What I am needing is ....

I have a product @ 2.99 and an attribute set at @ +0.50, when this attribute is selected the price remains at 2.99, only when 'added to cart' does it include the attribute into the price. I am would like the attribute to be added to price prior to adding to cart.

hope this makes a little more sense.

But I will have a look at that add on anyway, maybe it does what i'm looking for.