Glad you got it working!
Yeah, for future reference, Apple distributed 7.5.3 as a free standalone installer:
http://www.info.apple.com/support/oldersoftwarelist.html#system
Scrolling down a bit you should see:
Macintosh/System/Older_System/System_7.5_Version_7.5.3/System_7.5.3_01of19.smi.bin
through
Macintosh/System/Older_System/System_7.5_Version_7.5.3/System_7.5.3_19of19.part.bin
Those 19 parts will give you the full 7.5.3 installer, although it looks like it will just mount as one huge .smi rather than creating separate install disks, so I'm not sure if it would have helped you in this situation.
Yeah, for future reference, Apple distributed 7.5.3 as a free standalone installer:
http://www.info.apple.com/support/oldersoftwarelist.html#system
Scrolling down a bit you should see:
Macintosh/System/Older_System/System_7.5_Version_7.5.3/System_7.5.3_01of19.smi.bin
through
Macintosh/System/Older_System/System_7.5_Version_7.5.3/System_7.5.3_19of19.part.bin
Those 19 parts will give you the full 7.5.3 installer, although it looks like it will just mount as one huge .smi rather than creating separate install disks, so I'm not sure if it would have helped you in this situation.