Igor27,
Sorry I was tied up with recent builds of projects. Please find the rotary encoder firmware attached here as attached. Both 16X2 and 20X4 displays. My google code site is probably down (google decides not to do code site anymore) and I couldn't upload to google code site. Please refer to the connection guide for rotary encoder. I'll get you some updates on where I will be hosting these files and their updates.
Instruction at the end:
http://www.inmojo.com/store/liudr-arduino-and-physics-gadgets/item/rotary-encoder-keypad-kit-20x4-lcd/
If you want a rotary encoder keypad kit, let me know. I'm going to order some circuit boards for the kits.