Is it possible to recover from severe narcissism, bpd, and histrionic and be a good, loving parent?

Never say never: It will be a challenge, but with a lot of support, good psychotherapy and a stable, loving atmosphere it may be possible. Good luck with your efforts!

Motivation: I agree w dr. Weixel. The most important question is: how strong is your motivation to be a good parent?

Therapy: With intensive, long term therapy and medications, it is possible. I would recommend psychoanalysis.