caps lock key unlockwith shift-key?

> who can tell me how to change the unlock-function of "caps-
> lock" from hitting caps lock again to the shift key. i am
> working on a one-week-old toshiba tecra s1 notebook. i
> found the solution a few days ago accidentally, but i can
> not remember where it was ...
> i have to write a long text tonight and it is a horror to
> use this for me unusuall setting.
> if there is anyone who can help me ...
> TROLL from austria