Psychosis is a total mental break with reality. If she were truly psychotic, she would not be able to assist her defense, and we would likely not be here. (Andrea Yates or Dena Schlosser are very synonymous with psychosis.)
Bipolar is the new term for manic depression. Many people experience depression - though bipolar is obviously an extreme variant - it's very treatable with the right course of medication and/or therapy.
Borderline is one of the Cluster B personality disorders. I don't know nearly as much about BPD as I do antisocial or narcissistic, so I'll keep it as generic as possible. Personality disorders are highly resistant to treatment because the afflicted personality often externalizes blame (everything is everyone else's fault, always); they're very prone to utilizing manipulation on those around them; they can be deceitful, abusive, and sometimes extremely selfish. Many also often lack empathy or appear callous. Some can be impulsive, risk-takers, and criminalistic. More specific to BPD, in the little I know, they often have unstable relationships, a deep fear of abandonment, anxiety, depression, detachment, withdrawal, etc. (In just my jaded, biased opinion - it doesn't get more serious than PD. The treatment options aren't great, no known cure, and it deeply affects all those surrounding the afflicted person too - often without them even knowing what's causing the person they love to choose to act irrationally and sometimes even violently.)
TMK, it's rare for a Cluster B to be in and of itself, by itself. Very often, people afflicted are comorbid with a vast array of possibilities. I think it very likely Jodi's comorbid too - but probably exhibits BPD traits most consistently and/or acutely.
(All MOO and honestly not meant to offend anyone.)