HP41CL Machine Code setup

[MeindertKuipers]

It looks like you are doing everything right. With CCD-OSX loaded did you do a CAT "0 G? This gives you a complete overview, and Page F should show you QRAM.
As an extra test you could try to poke and then peek in the first location of your ROM to give it an XROM number. ALternatively you could copy an existing ROM from flash to your RAM page (verify with peek if data has been copied), plug it and check if it appears in any of the CAT options.