dovecot - Mar 2007 - Courier's courierpop3dsizelist - uid convert

Hi
Migration page [1] on wiki says 
"Courier version 3 (younger versions)

    Here everything has changed: Courier's UID data are now stored in 
courierpop3dsizelistand in a completely new format. But it's still possible 
to convert it to the format dovecot needs (link to perlscript and further 
configuration details will follow later). "

but there's nothing more. I couldn't find any ready to use script for
the
conversion. Maybe somebody has it ready or could help me, I can write perl 
oneliner but I don't understand the format of index files.

dovecot's is like this 
1 1174291188 518
1 1174181234.P58178Q0M660793.sas.xxx.xxx.xx:2,
2 1174286738.P16096Q0M408737.sas.xxx.xxx.xx:2,

courierpop3dsizelistand  is like this
/2 703 1105349624
1135668673.V41dI2c3c85.sas.xxx.xxx.xx:2,S 12176 184:1105349624
1135766433.V41dI2c3c95.sas.xxx.xxx.xx:2,S 170450 185:1105349624

I understand every line starts with mail filename, but I don't understand 
latter values. I'm also not sure about first line of dovecot's file.

Any help would be appreciated :)

greetings
marcin

[1] http://wiki.dovecot.org/Migration
-- 
Marcin Gryszkalis, PGP 0x9F183FA3 
jabber jid:mg at fork.pl, gg:2532994
http://the.fork.pl