Cool, thanks. I've seen that sampler on my Nord installation disk but I assumed that there would be some level of loss of quality? Or can the output from the sample engine interpolate cleverly and recreate a faithful (or, at least, high quality) representation?

Honestly, I've never tried it myself. But the default piano sounds you hear on the Nord Piano are essentially multiple high quality samples, so I'd think that as long as you can sample your original synth sounds in sufficiently high quality, they should sound pretty good.