Convert your vBulletin 3.x Templates to vBulletin 4.x
Here you have a helpful script in this matter:
Our team is in the middle of upgrading a high traffic vBulletin 3.6.8 Website to vBulletin 4.0.3.
We are working on a Stage server (private testing server), upgrading files/database was pretty straigthforward, we just followed the instructions in “vb4_readme.txt” of the vB4 package.
Our problem came when we wanted to preserve the Website look and feel, the vBulletin Template Syntax changed considerably with vB4.
In our particular case we got to the conclusion that it would be easier to take the old template (preserve markup, tables, etc.) and change the syntax of the tags from vB3 to vB4.
Doing this manually is an exhausting and error prone process, that is why we created a simple copy/paste PHP script to do the work for us:
We are not done with the upgrade yet so there may be some improvements we could make to the script but I thought on making it publicly available in case someone could need it, so there you have it