lol, im not sure if im going about it the right way because i've read about other people getting it out via FAR manager or something (not sure how that works...) but i just download any custom packs (like here... CUSTOM PACKS eSnips Folder)
then unzip it.... find the customize.xml.... edit it as needed... and then zip it back up (preserving the folder structure)... then i send it into my phone using setools2 lite or something allong those lines...

hope this helps =)