You can assume control over the body of a mindless undead creature, such as a skeleton or zombie. You can target any creature whose Hit Dice are equal to or less than your manifester level. When you take control of the mindless undead creature, you leave your body empty of sentience and mind, but it still breathes. The power ends when the undead body is destroyed, you leave the undead body to assume control of your own body, the duration of the power ends, or some other force (such as dispel psionics) drives you out of the undead body and back to your own.
While in the body of the undead creature, you retain your Inelligence, Wisdom, Chrisma, level, class, base attack bonus, base save bonuses, alignment, and mental abilities (as well as psionic powers). The body retains its Strength, Dexterity, Constitution, hit points, natural abilities, and special abilities.
As a stand action, you can shift from the undead creature to your body if it is within range, relinquishing control of the undead creature. Doing this causes the power to end.
If the undead creature is destroyed when your body is beyond the range of the power, both you and teh undead creature die. Any life force with nowhere to go is treated as slain.
If the power's duration expires while your are in the undead creature's body, you return to your own body instatnly (unless your body is our of range or destroyed, in which case you die).
If you spend 2 addition power points, you can attempt to assume control of an intelligent undead. In this case, the undead gets a Will saving throw to resist the attempt. If the save fails, you control the undead's body, but its mind remains in the body you assume control over, and it can attempt another saving throw every 1d4 rounds to force you back into your own body (which means you could die if your body is out of range at the time of a successful save).