Workgroup Manager is wonderful, but it doesn’t tell computers which printer drivers to use. Which is annoying when a certain Ricoh printer/copier doesn’t work with the default OSX supplied driver (unless you have postscript fonts installed on the printer) and instead just spews out pages of garbled nonsense.
Thankfully, there is a reasonably easy fix!
1. Follow this page to create a custom PPD file, with exactly the driver you do want to use. Gutenprint ones work fine!
2. Follow this page to point your Macs to that custom PPD file using Workgroup Manager.