You can do it with a manual timer, just like a VCR:
A Manual Timer allows for the creation of a timer without the All Episode and New Episode Frequency options. The Search function operates similarly.
1. Press DVR twice on the remote (three times for a 625 receiver).
2. Go to and select Timers.
3. Go to and select Manual Timer.
4. Enter and select the channel number.
5. Set Frequency and Type.
6. Select Edit Time.
7. Set the start time, end time and timer date.
8. Go to and select Done.
9. Go to and select Set Priority.
10. Left arrow to select event. Use the Move Up option to adjust the timer priority. Go to and select Done.
11. Select Options to add start and end time and to protect the event from being deleted when system locks are set. Select Done.
12. Go to and select Create Timer.