Emulate mouse wheel scroll with keyboard
It's possible with AutoHotkey.
Try this script for instance: Using Keyboard Numpad as a Mouse. It uses the Numeric Pad to emulate a mouse. When on, NumPad+ and Numpad- emulates the mouse wheel.
SerioSoft MKey does the job quite well.
This is much easier than making AutoHotKey scripts. TIP: If scroll doesn't work after making "scroll hotkey" try to change default scroll speed setting from "1" to "2".
You can also take a look at: AtnSoft Key Manager