This page here should help you with some of your questions:
Shared SSL will not function with ASP, JSP or PHP pages. It will function only with html, and cgi/perl based documents/scripts/carts. This is due to security restrictions on the servers. If you require SSL for PHP, ASP, JSP, you will need to purchase a personal certificate and dedicated IP.
We do not offer a Shared SSL Certificate with our Windows plans.
https://support.lunarpages.com/knowledge_bases/article/175