1. Exactly. You may *run* the software as long as you like, but updates cost US$ 30 a year. But: Updates are optional, so you don't have to update if you don't feel like it. And 30$ isn't really that much...
2. Don't worry about that. Installing the hack is more or less following some simple "FIND / REPLACE" instructions. One doesn't have to know any PHP or HTML to install most hacks. And if you still have problems you can always ask here at vBulletin.org
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