Biztalk Error Codes
You can lookup your Biztalk Error codes using this tool ,You can look at this tool from inside VS.NET .
Download it form Got Dot Net here
Once you unzip the tool . You can open up your VStudio->Tools ->ExternalTools and Add this Exe and give a descriptive name like "Biztalk Error Code Lookup"
So next time you get an Error , It is right there