Recently I installed Amazon payment plugin v2.1 for my default installation of osCommerce v2.2.
The Latest add-on for RC2 can be found here: (this is what I used)
And the latest add-on for MS2 and RC1 can be found here (this has been branched out of the above):
The latest version is Checkout By Amazon v2.1 for osCommerce.
I simply followed the Option 1 - FRESH OSCOMMERCE INSTALLATION as mentioned in INSTALLATION_GUIDE.txt.
My setup isn't perfect because:
1. Installation Notes mentions:
"Installing this plugin will create two new tables in your OSCommerce
While these two tables were not created
2. I don't know how to sync Amazon orders in osCommerce. I clicked on the Button "Sync Amazon Order button", but I didn't get any new Amazon checkout order.
On a positive note, I was able to successfully use Amazon checkout to place a order (as a buyer) and cancel the order in http://SellerCentral.amazon.com (as as seller)
P.S. you'll need to have a :
- Checkout by Amazon seller account. All details are mentioned in the documentation in http://addons.oscommerce.com/info/6591
- a seperate Amazon account for the buyer
Hope this helps