And the good news about making floppies is that all you need to upgrade an existing System 7.5 install to 7.5.3 is System 7.5 Update 2.0, which is available as floppy images on Apple's web site. You will need to have StuffIt Expander to extract them (download from StuffIt's website, you can leave email address blank now and go directly to download page). Tip: If it extracts to .sea, rename to .sit and open in StuffIt Expander again.