Sure, however, I'm going to explain it briefly first and see if you can get it to work.
1- Open two notepad, save one of them as "old.html" and save the other one as "new.html".
2- In the "old.html" file, paste the code of the old template. In the "new.html" , paste in the new template. You can get the new template code by either reverting the template or by looking at the vbulletin's default style.
3- Once you have the templates saved in old.html and new.html, open Beyond compare and compare the files.
4- Look for pink/red highlights, the red highlights are the differences between the codes.
5- Once you see the differences, you can either right click the lines and copy them to the other side, or you can edit the lines yourself and make the adjustments.
Hope that wasn't too confusing

aranoid: