The best advice I can give you is that Sual is not your greatest threat in this level. His damage to you is not too much. If you have force wave use it. Everybody but Saul will be knocked back. I usually have Bastila take out the guards with either lightning or some other offensive power. Have your character take out the dark jedi - they are your biggest threat. Ignore Saul until everybody else is down. Like Ztalker said, spamming grenades works well too.
Honestly it would help a lot if you gave us some info about your character as the guardian and councelor should have different strategies.
To enable your cheats you have to go to the swokotor.ini file and type "EnableCheats=1" (without the quotes) underneath Game options.
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