Date Repeat: same event, but with different hour by weekday

Hi,

I have a problem with repeating a event from initial date to final date repeating some weekdays with different initial hour. Confuse, no?

Example:
My event occurs from 01-01-2011 to 12-31-2011 only at Monday and Saturday.
If it's Monday, it will be at 10pm-11pm, but if it's Saturday, it will be at 8pm-9pm.

How could i setup this condition using date repeat?

Right now I'm using two events, one for Monday and another for Saturday, but they are different posts, so doubled text :-(

Any help?

thanks