It all depends on the answer to the two questions below:-
1) Have you or anyone else in your company created any features that affect wither the E811\System directory (on the client) OR the JDE.INI file on the client - If not then NO.
2) Do you have any developers working on your system? If so then you should have created a Web Development Client feature to deploy to them. If the package is for DV811 then Yes you do need to add that feature, if the package is for any other non development environment then No.