How-to repair ICQ contact-list

Hi,

I used Pidgin 2.5 some time ago with my ICQ account. After some contacts/groups renaming contact-list messed up: most of aliases are not longer related to ICQ#s. Now I use 2.6.2.
I googled a lot to make script like this:

for user in contact_list:
  user.alias = user.vCard.nickname

I would be very happy if someone of Pidgin developers (who is familiar with OSCAR) pointed me a right way to do this. At least this mess is Pidgin's fault ;)