Expresso/Coffee will work for temporary file associations.
Is there anything for Temporary Context menu when portable drive is attached?
Means without host modifications.
Note : it may be useful when we want our favorite applications to be opened for particular extensions that can be configured in context menu. it will give quick access.(Expresso/coffee will work for one favorite applications) but this will be helpful for use more number of favorite applications.
Let me post your comments and examples of those.