If you put 3 points in lockpick, that isn't waste. <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
Lockpick is useful skill.
You don't need to lockpick any doors to enter Stormfist castle.
What doors do you mean?
The one in the prison can't be opened.
And the other door/stairway leading to Stormfist castle will be open after you have te
Rescue Zandalor quest.
Oh and one more thing:
If you really think you wasted any skill points, use the save editor.
Click here for more info about the editor.