Create Repo with specific firmware version(s)

I'm having an issue updating iDRAC firmware on M640's in OMEnterprise from 3.2x or below to 4.0. The resolution I've found is to update the iDRAC to 3.3x first, and then update to 4.0 through OME, which works.

Question is - how can I create a repository in Dell Repository Manager with iDRAC version 3.34.34.34???