Can't you just copy all the files in the sub folder to the root folder via FTP?. You would just need to make sure even the hidden files are moved (.htaccess)
My website was ready and everything working great with Silver Stripe and so today I
decided to moved the files to the root via FTP and I get this error: PHP 5 required
To run SilverStripe, please install PHP 5.0 or greater. I didn't change anything, except for the "SS" in the hidden (.htaccess)
Worked here http://www.lasergraph.fr/SS/
Doesn't work here: http://www.lasergraph.fr
some hosts use the .htaccess to tell their server if you are running php4 or php5 - make sure you haven't deleted that existing htaccess rule in the root folder which told the server to use php5 rather then 4
Thanks Will, that was it!!!!