man i know nothign about tuning these computer's... looks quite complicated, but i guess if sum1 showed you hwat they do and explained it to you, it would make it alot easier.
MAD082 - see if u can get sum1 to work your business for the day while u do it, or if u are your own boss then, u will just have to cut your losses and take a day off, maybe a saturday since they most likely arent as busy as the other days.