phpBB to vBulletin 4. Need SEO help.

[toonysnn]

I'm currently helping a customer convert over to vBulletin 4, and this is quite top priority for their forum. They're asking to be able to prevent content duplication penalties from Google, and I want to know if I've done this right, or if there should be something different done.

I've blocked all the old links via robots.txt, adding only the public vBulletin links (thread,post,blog,etc), used vBSEO's 301 / 404 redirect script to redirect the old links to the new posts/threads/users.

What else should you do in order to keep your pagerank on google?

Thanks