Problem with new database

[cragtay]

My forum has been online for 1 year. In that period, I installed some mods, hacks, plugins, etc. and edited the style (not default style of vbulletin, and I can't remember all changed things).

Now I want to change to another style and don't want to use some mods any more. In general, I want to make a new, fresh forum but keep the users, forums, threads and posts which have been in my current forum.

I can uninstall some mods which I don't want, and install a new style to current forum. However, it is like when you uninstall a software from Windows: the uninstall process is not completely remove all things. There will have some files, settings, etc. left in the OS.

I think that I will install VBB again, install a new style and import some necessary tables of the current database to the new database, and I will have a new interface for the forum while keeping users, forums, threads and posts. Is it possible? If yes, what are the necessary tables?

I need your help.