Change from Residency-without-Work-Permission (Non-Lucrative visa) to Residency-with-Work?

Hi, has anyone here entered Spain with a non-lucrative visa (and followed up with registration to formalize the corresponding residency once in Spain) and then changed (during the renewal period) to a work-permitting residency? (I hope to do this by way of the modificaci?n for cuenta ajena, for cuenta propia, or for profesionales/investigadores altamente cualificados).

If you?ve been down this road before, I?d really appreciate hearing about your experience. I know I?ve got a lot of ?figuring things out? ahead! Thank you very much!