Thanks for the update.
I don't recall the conversation with Ludek sop can't say for sure but OLE DB to Accdb is fine. It could be MS has puiblished they are dropping OLE DB for SQL Server and suggestingh everyone move to ODBC because it's cross platform... Other than that I don't see any reason why not.
Process Monitor will not force CR to use anything, what it will do is compare collect the list of dll's and then you can compare what the differences are.
As long as the attachement is less than one meg you can use the Advanced Editor to attach a file. zip it up and then rename it to *.txt
Don