Belkasoft Forensic IM Extractor Description:

Tool for e-crime/forensic professionals that eases their work on analysing Internet Messengers histories. Supports various IMs:
ICQ versions 99a up to ICQ5, MSN Messenger, Yahoo! Messenger, &RQ, Miranda. Supports deep ICQ analys using different methods (with and without usage of index file) that allows user to extract even deleted and overwritten messages. The latter ability is indispensable for e-crime professionals.

Belkasoft Forensic IM Extractor allows you to extract your IM history into such formats as plain text, HTML and XML. It is possible to select the time period of interest, generate history for
chosen contacts only, filter sent or received messages. It is possible to extract history broken by contacts, and use command line for extraction.

Multibyte codepages (like Chinese) are supported.
There is Built-in History Converter to ICQ5 history format.

You can split histories by conversation sessions using xsl file included into the package.