Go to the download section of this site,
click on the "Custom File" Icon
Scroll the list for your phone.
Choose a package, that will appeal to your language
(doesn't matter as long as you chose one with English support, like United Kingdom.. that's what I used.)
I chose the United Kingdom T-Mobile package, and T-mobile doesn't exist in Canada where I live,
So you should be good.
Download the File, open it up...
and you will be able to see all the files that come standard on the
phone you selected... including customize.xml.
Use the a2 uploader, or whatever program you use to flash your phone
to replace the file.
Good luck.