Large Joomla Site Migration 1.0.15 to 1.5.20

I have a fairly large Joomla website that is currently version 1.0.15. I am wanting to migrate this site to the 1.5 Joomla platform, but due to the large amounts of information in the tables, I'd like to get some help with it. EXISTING JOOMLA INSTALLATION (TO BE UPGRADED): Joomla! Version: Joomla! 1.0.15 Stable [ Daytime ] 22 February 2008 23:00 UTC Database Version: 5.0.91-community-cll PHP Version: 5.2.9 Web Server: Apache WebServer to PHP interface: cgi NEW JOOMLA INSTALLATION: Joomla! Version: Joomla! 1.5.20 Stable [ senu takaa ] 18-July-2010 18:00 GMT Database Version: 5.0.51a-24-log Database Collation: utf8_general_ci PHP Version: 5.2.13 Web Server: Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.7e mod_auth_pgsql/2.0.3 Web Server to PHP interface: cgi-fcgi All of the articles have already been copied over, and I have installed the majority of the components that I will need in their new versions. Below is the remaining content that I'd like to migrate: Community Builder - all profile information uddeIM - all private messages Fireboard - migrate to Kunena and transfer all previous posts and information GroupJive - migrate all group information and integrate with Kunena EventList - migrate all event information, and integrate with GroupJive hwdVideoShare - migrate all video information hwdRevenueShare - migrate all banner/statistic information Datso Image Gallery - migrate all picture information to hwdPhotoShare VirtueMart - migrate all product information and previous sales information DocMan - migrate all group membership, documents, etc. INTEGRATE VIRTUEMART AND DOCMAN SO THAT CUSTOMER CAN BUY A "DOWNLOADABLE" PRODUCT WHICH AUTOMATICALLY ADDS THEM TO A DOCMAN GROUP (this is already implemented in the current site)