Hi, i read about how to simulate arduino board with proteus but when i try to access the hex file for the board in proteus to load the program code, in the temp folder in the Appdata hiden folder, i cant find it anywhere by searching for it! any ideas?? 
this link can help you http://www.praphas.com/index.php/2008-11-03-14-25-25/51-arduino/88-arduino-3-proteus
just see the picture.