Hi,
If your objective is to have the content of a text file in an excel sheet,then
you can have a text file in your excel sheet by importing also,other than embeding it as ole object.
The path of the imported text file
will be in the part called connection.xml.
If you want to create bin files programmatically,the following link may help you.
http://www.codeproject.com/KB/cs/office2007bin.aspx