I can't help you with another .lit app, but if you tap on the number between the two microscopic arrows, MsReader will page down. That's easy to do without the stylus. Unfortunately I don't know any tricks for page up. I ran across an app called VolDpad to remap your volume keys as the Dpad up and down on XDA, but I haven't actually tried it, since I rarely page up. Maybe that would work for you.
http://forum.xda-developers.com/showthread.php?t=552947