BEFORE YOU START: Familiarize yourself with the ImageWriter II Technical Procedures.
Design changes made to the paper guide require a different method of installation. There are 2 different ImageWriter II paper guides. The NEW paper guide has a reinforcing bar molded to the bottom of the opening that is covered by the "metal foil". The older part does not have this reinforcing bar.
Solution:
Remove the print head first before installing the new-style paper guide. See the ImageWriter II Technical Procedures for more information on how to install the paper guide. Then follow the normal paper guide procedure as documented in the ImageWriter II Technical Procedures.