CommerceOne OnRamp 30 used with MarketSite 46

Has anyone successfully integrated with MarketSite post version 4.1 using the CommerceOne OnRamp 3.0 package? The official line is that webMethods only supports up to version 4.1, but we have a requirement to integrate with MarketSite 4.6. If you have integrated with Marketsite 4.6, were there any changes you had to make to the
webMethods CommerceOne OmRamp 3.0 package?
By the way, we are using IS/TN 4.6.