XF 2.1 Import data from a forum?

[webmastersun]

Hello,

I had a forum running XF2.1 and now I want only to use its theme and adds on installed on this forum and import all posts/ threads/ members/forums from another forum without reinstall from scratch. Is that possible? and right way to do?

I mean I will delete all posts/ threads from current forum and import members/posts/threads/forums from targeted forum.

Please suggest.

Thanks