[Dovecot] Quota per domain

Hi People

I have a two question

I use dovecot 1.0.10 I have quota maildir

1- I want to use the last version of quota 1.1 in my dovecot , i have to patch then, so which file i have to apply ?

http://dovecot.org/patches/1.0/

this one quota-rewrite-1.0.9.diff ???

When i using the original version with out quota new 1.1 , in my mailbox is created a file called maildirsize with the quota , but when a apply the patch the quota this stop work for me.

2- if is posible define a quota per domain?

%n@domain1.com = 100M %n@domain2.com = 0 --- no limit quota

or

@domain1.com = 100M @domain2.com = 0 --- no limit quota

Once again , sorry for my english

Thanks