no attiny45 menu-entry (solved!)

hi folks!

i just started experimenting with an attiny45. i found a tutorial where i can read:

“select the menu-entry tools->board->attiny45”

but i cant fint this menu-entry in my ardunino-ide?!? i am just using the 1.0.5 ide? it should work?!?
anybody any ideas?
thankyou!

okok! i found a better tutorial! i just have to download the attiny-files in the archive attiny45-85.zip and copy them in a folder called "hardware" in my arduino sketchbook.

you can also download the files here: http://highlowtech.org/?p=1229

now it should work.