Hello again,
After a bit of research, I found the files I need !! So if you want those hardware files (for the ATtiny24,25,44,45,84,85,2313,4313 ; ATmega32 (and some others)), go to this download link :
http://www.mediafire.com/download/oq1i8c24t2uoqrc/Atmel_Boards.rar