turtle slot selection

How can I make my turtle select another slot of Items to place?

Type "help turtle" in the console. That will give you your answer.

sry for that, I'm stupid as hell^^ anyways, i've got another problem now, I always get an "too long without yielding error" how can I fix this (and are there any ways to copy+paste the code on my local machines onto the forums?)

You have to make your program yield for events sometime, you can't have it in an infinite loop. There's a couple of ways to do it, one would be to use sleep(0), another one is adding this:

os.queueEvent("fake")
os.pullEvent("fake")

that would solve the error.
For the copy-paste, you can open the files in .minecraft/saves/<YourWorld>/computer/<ID> where ID is the id of the computer wich you want to access the files.

thanks, worked fine^^ also good to know where the computerprograms are located, now I'll never lose a file again