How do I migrate from one vB 4 to another vB 4??

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I know, the tiles aint clear... so here goes:
I have a forum whose version is vB 4.1.5 and I want to migrate it to another forum which is vB 4.1.5 PL1 (migrate, mind you... I wont be upgrading)

I am facing loads of problems like DBTech Shoutbox aint showing up, The editors button are gone (but they are still in the folders...), InfoPanels going nuts etc etc...

so, I think a simple solution is install a fresh new forum and move all the users, posts and attachments...

but the worst thing is that, I cant make it working... installed ImpEx 1.103 (the latest one, forgot the version number ) but getting errors during import (and also dont see any option for importing a vB 4 forum so I selected vB 3)...

Can someone help me with this? and show me the correct path... :up:

Thanks

P.S. You might think whats wrong with the old one?? Well as, I have told you... the templates and everything is messed up and I cant fix it but can get a grip once start from the beginning...