To change superpowers, you have to edit a "*.idx" file in the "\hero x\savegames" folder in the game directory. Change the values such as health recharge, power recharge and others, and then find the "[Player]" heading to change the following attributes. When adding super powers, you must also add to the "titles=" line under the "[Player]" heading. List all of your super powers there.
Hitpointrecovery (sets speed of hit points recovery)
Powerpoints (sets the number of power points)
PowerPointRecovery (sets the speed of power points recovery)
Hit (sets the number of hitpoints)
Titles (sets the names of available super powers)
Find the "[PowerActive]" heading to change one of the following attributes (up to 10 powers can be edited). Change the number after the "=" to "0" (disabled) or "1" (enabled).
superspeed=
superstrength1=
supersense=
superfireball=
superfreezeray=
supermultiply=
superforcefield=
superfrenzy=
superdangersense=
superelectricbolt=
Then, find the :[PowerEnabled]" heading to change the following attributes to "=1":
superspeed=1
superstrength1=1
supersense=1
superfireball=1
superfreezeray=1
supermultiply=1
superforcefield=1
superfrenzy=1
superdangersense=1
superelectricbolt=1