This might be a silly question, but I honestly don't know. I did a search for this, first, but nothing came up, so here goes...
Can I run Liberator? http://www.freeliberator.com/
Must I use PS?
If so, could I get some recommendations of hosters that would allow me to run this? If I can run this, and anyone has experience with Liberator, may I contact you via e-mail for a (possibly) lengthy discussion on its use and customization?