You can run into some trouble installing BizTalk Adapter Pack 1.0. I stumble upon the following:
1: Messaging Engine
The Messaging Engine failed to add a receive location "MyReceiveLocation" with URL "oracledb://xxxx" to the adapter "WCF-Custom". Reason: "Microsoft.BizTalk.Adapter.Wcf.Converters.CreateBindingException: Unable to get binding type for binding extension "oracleDBBinding". Verify the binding extension is registered in machine.config.
at Microsoft.BizTalk.Adapter.Wcf.Converters.BindingFactory.GetBindingType(String bindingName, Type& bindingElementType)
at Microsoft.BizTalk.Adapter.Wcf.Converters.BindingFactory.CreateUserBinding(String bindingName, String bindingConfiguration)
at Microsoft.BizTalk.Adapter.Wcf.Converters.BindingFactory.CreateBinding(String bindingName, String bindingConfiguration, String bindings)
at Microsoft.BizTalk.Adapter.Wcf.Config.CustomRLConfig.CreateBinding(RHConfig rhConfig)
at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfReceiveEndpoint..ctor(BizTalkEndpointContext endpointContext, IBTTransportProxy transportProxy, ControlledTermination control)
at Microsoft.BizTalk.Adapter.Wcf.Runtime.WcfReceiver`2.AddReceiveEndpoint(String url, IPropertyBag adapterConfig, IPropertyBag bizTalkConfig)".
The receive location "MyReceiveLocation" with URL "oracledb://xxxx is shutting down. Details:"The Messaging Engine failed while notifying an adapter of its configuration. "
There is a site, where you can find useful information to resolve issues with Oracle Adapter Pack 1.0. I had to change some things in machine config (as explained on website).There is also information available concerning adapter pack in x64 environments, so definitely check this inforation out!