Cant restore damaged website - Joomla 3.x: Общие вопросы

Hello.

I have a Joomla 2.5 website that got damaged when tried to upgrade to 3.0. I need to recover the content (articles, categories, and users). I'm looking for a script to help me transfer all articles, about 20k of them, to a new install in 3.0.

I backed up those tables into a file but, noticed there is a change in 3.0 table structure and can't simply copy/restore the backup. Was just thinking of going back to 2.5.28, restore the content and redesign a new template.

I would appreciate if someone can guide me into finding information on doing such task.

Thanks in advanced for your time.