Not a simple job but here goes:
1. Make sure the adapter is configured correctly on the BizTalk side. Recommend this is done manually follow Mick Badran’s excellent blog here!!
2. Take the WSSv3 Adapter WS and copy it to the SP2010 environment.
3. Make changes to the WebService Web.config thus:
OldVersion=XX.0.0.0 NewVersion = YY.0.0.0
Note: Typically xx=11 yy=14. The version numbers of the Microsoft.SharePoint.dll