Let's say I want to deploy an application every Friday at 11:30 p.m.

I make the app object and for the availability, I put down "start date"
and "end date". Start date: 11/19/07
End date: 11/19/09

I click the "Friday" button (it's the only one "clicked")

Then I specify start time of: 11:30 p.m. and end time of: 11:30 p.m.

Am I doing it right?

It didn't seem to work properly.

Oh, this is associated to users, not workstations.