Designing for iPhone OS 2.0 and 3? Is that possible?

Question

I have an application built for iPhone 2.0 but I would like to use StoreKIT to offer in-app purchase.

If I recompile the code under 3.0, I can use StoreKIT but I will piss those who bought my app and do not upgraded to 3.0.

Is that a way to create a code that can work on both worlds? If yes, what steps should I follow?

thanks for any help.

Answer 1

See this question about how to use 3.0-only features in a 2.0 compatible app. The sample code is for using the mail compose controller, but you should be able to do this with the store kit framework too.