Convert VBulletin to PhpBB?

Not sure if this is the right place to post this but I have been trying to make some changes to our teams website. I would like to change our main page and forums from their current setup ( to this theme ( Our site currently uses VBulletin for the forums but the new theme uses PhpBB so I need to find some way to keep the current users and forum posts. Any help would be greatly appreciated. Thanks.

If you want to migrate from one to other on the phpbb site exists a thread about it.

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