KMail: adding POP3 account

Hi,

at the moment I'm using KMail to manage emails from three IMAP servers, as 
well as my local messages. Local messages are those messages that applications 
in my localhost send me, and I access them in Local Folders/inbox.

Now I need to add a new account, fetching emails from a POP3 server. I've 
followed the steps of the wizard, and also tried to create the account 
manually, but I don't get the expected result. I choose POP3 as the service, 
and end up with a destination folder located in Local Folders/inbox. I can 
change the destination folder, but the only options are Local Folders, and 
folders already created for the IMAP accounts. 

I'd rather have a completely new folder structure, for storing emails of this 
POP3 account only, similarly to what is possible in e.g. Thunderbird. However, 
I didn't find any way to create a new folder at the same level of Local Folders 
and the other accounts. What should I do?

Thanks!