BIOS WAKE UP Vostro V230 MT

Hi,

I have just purchased some Vostro V230 MT and would like all my PCs to wake up in the morning. I can do this via the BIOS but I only want the PCs to wake up on weekdays, not on weekends...the only option is everyday or a specific date. Is there any way around this or is this something that will be included in a BIS update?

Thanks