convert java payment classes to use them in google app engine java application

Hello, I have with me the open source version of a java shopping cart named " <layer id="google-toolbar-hilite-22" style="background-color: dodgerblue; color: black;"> <layer style="background-color: dodgerblue; color: black;" id="google-toolbar-hilite-32"> <layer style="background-color: dodgerblue; color: black;" id="google-toolbar-hilite-32">Konakart</layer> </layer> </layer> ". Separately I have with me a java google app engine script that allows a user to purchase 'links'- payments are either recurring or one time. I want you to ensure that the <layer id="google-toolbar-hilite-23" style="background-color: dodgerblue; color: black;"> <layer style="background-color: dodgerblue; color: black;" id="google-toolbar-hilite-33"> <layer style="background-color: dodgerblue; color: black;" id="google-toolbar-hilite-33">konakart</layer> </layer> </layer> <layer style="background-color: yellow; color: black;" id="google-toolbar-hilite-0">payment</layer> classes work in google app engine, if some class is used which is not permitted by google app engine, then you have to replace that with a google app engine compatible class. The script (for Google App Engine) allows payments to be made via Paypal. I want you to add moneybookers and chronopay as <layer style="background-color: yellow; color: black;" id="google-toolbar-hilite-1">payment</layer> gateways to the Google App Engine script. Support should be there for both recurring and one time billing. Also there should be a simple screen to cancel recurring billing at any time for a user. Simple work for a good java coder. Regards, Arvind.