I used 01877. I am using a Scientific Atlanta HD DVR box.

Now I should just follow these steps right? (Replace Step 4 and 5 with new codes and PIP buttons)

1) Press Setup until 2 blinks
2) Enter 994 (2 blinks)
3) Tap Setup
4) Enter 00249
5) Tap OnDemand
The remote should blink twice.

Edit: Just wanted to let you know that it worked. Thanks a lot for your help.