Customize PWA - mark weekends

[David]

is there a way to mark weekends in the task view of PWA -
i would like to either block weekends for working time
entry or mark them in some way - thus the task view is
clearer and if resources book ahead (vacation etc.) they
hav a clearer view. i am using monthly reporting periods
thus it gets quite complicated figuring out what was
weekday and weekend at the end of the month when the users
do their reporting!!!

does anybody hav any idea about that???

thanks

david