In the keyboard programing utility:
1. Right click on the F key you intend to program and select "Define Macro Key"
2. On the numeric pad on the next screen click 1234 Enter (for example). It will show up as 1(End) 2(Down) 3(PgDn) 4(Left) Enter(pad). Click in the box where this shows up and clear all text except for 1234Enter
3. Click Set then click Okay
4. On the next screen click Save.
If you have more functions to program on additional keys, repeat steps 1 through 4 at this time.
Once you have the keys programmed click Program.