Installing BizTalk has never been a joyeous activity. After installation, when trying to register the BizTalk 2006 Runtime during configuration, you might get an error along the lines of:
Could not deploy 'Microsoft.BizTalk.KwTpm.RoleLinkTypes' on computer
'SVR-NAME'. Please check if BizTalk is installed correctly.
Vague error message. To get rid of it, make sure that the NETWORK SERVICE has Full rights to the Windows temp folder.