At the BioDerm facility to select a new pilot face, press [Ctrl] + [Left Square Bracket] or [Ctrl] + [Right Square Bracket].
Cheat Codes
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Using a text editor, edit the "storm.ini" file in the game directory. Add one of more of the following lines under the "[SPECIAL]" header. Then, start a game and press [Ctrl] + O at the indicated screen to activate the corresponding cheat function.