OsCommerce integration with Authorize.net

I have a LIVE OsCommerce store and am moving from processing credit cards via PayPal to Authorize.net. We are having issues with the installed contribution and integration with our site. We are looking for someone to debug and get [login to view URL] working properly. We also want to ensure that information is being successfully passed from [login to view URL] back to our web site and showing as payment received in customers Order Details. Turnaround time on this project will need to be 48 hours or less. The [login to view URL] AIM manual will be e-mailed to successful bidder to aid in getting things working properly. Preference for this project will go to bidders located in the US and Canada and with experience setting up Authorize.net. Bid to be awarded within 24 hours of posting.