Thanks for the quick response, Sean. I am anxious to try SilverStripe, as it looks perfect for my needs.
I have submitted a question to my provider about this, but it is strange, since their latest announcement said this:
"After Sep 10, 2007, we will start setting PHP5 as default PHP interpreter on our servers. This means that files ending with .php will be parsed by PHP5 by default. However, customers will still be able to set PHP4 as default interpreter, by using a directive in their .htaccess files.
The change will happen gradually on each of our servers and the exact date for each server will be announced later."
"We advise our customers to take the necessary steps to make their PHP driven software completely suitable to run on PHP5. If the software is a third-party application, upgrading to the latest stable version should be enough, as developers of popular software (forums, blogs, CMSs) have already released versions, ready to run on PHP5."
So, it looks like they supposedly run the PHP5 by default, which is why it confused me that SilverStripe's install thought otherwise. I will await their response though, maybe I'm missing something.
Thanks again for the prompt attention!