The information for present tense is correct.
Explanation: The stem changes for other tenses:
Subjunctive: puis- for all persons, singular and plural
Imparfait: pouv- for all persons, singular and plural
Future: pour- for all persons, singular and plural
Conditional: pour- for all persons, singular and plural
Passe simple: pu for je, tu, il,elle, ils, elles  pû for nous, vous
Participe Passé: pu
I hope this helps you, I'm not sure how much of this you need-- or if you need something that is not included here.