Hi Laszlo,
The Store module is provider based (Gateway, Shipping, Tax, ...), then you can create your own gateway provider. Please, please, please, before trying to work with the source version read this
post and follow my advices you will save a lot of times! The Store module is not a simple one with 21 projects, if you have not already developed a module for DNN, please buy a book about DNN (several are available at Amazon) or look at the
website of Michael Washington a well know member of the community. You can find also plentry of tutorials for a small fee at
DNNCreative. Because the Store module use the WAP dev model, if you don't know the difference between WAP and WSP, please search related articles at Microsoft or try
Google.
You can't create extra fields nor product variants with the current Store module. If you really need this feature, you can try
NB_Store from Nevoweb another free ecommerce module but NOT supported here. I can't tell you more about this product because I do not use it, but his creator (David) is a nice guy. You can also buy several others ecommerce module at the
DotNetNuke Marketplace.
The Store module version 02.01.36 released on 05/25/2010 is stable, you can read posts here most of times it's a problem with older versions.
Currently I work on a new beta version with a lot of new features, you can read my comments for each beta version at
Codeplex.
Gilles