DB,
I just went through all of this...and this is what I know, PHP and others will not work with a shared cert...you have to have a full cert. I got the one for 49$ there is a 24.95 set up fee and an additional charge for a dedicated IP at I believe 2.50 cents a month one time charge lump fee.
This is from the LUNAR FAQ
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.
A personal certificate can be installed on either account for a $24.95 installation charge. With a personal cert your link would appear as
https://yourdomain.com.
A personal certificate requires that you have a dedicated IP. A dedicated IP can be enabled on your account for an additional $2.50 per month, charged in a lump sum for the remainder of your term.
We can provide you with a certificate for $49.00 or $69.00, paid annually. There is a one time setup fee of $24.95.
The Basic Certificate, at $49.00/year, includes the following features:
* Fully validated, High Assurance
* 1024 bit industry standard SSL Certificate
* Trusted by all popular browsers
* 99.3% browser ubiquity
* $100,000 warranty
* 128/256 bit encryption
* FREE site seal
As far as WEB payments Pro...for oscommerce, it is my understanding that you dont need that, there is a contribution that can be used that will get rid of the certificate displaying when they change to make the payments on paypal then it returns the customer to your site. I havent installed that yet, waiting to finish up with other things.
This is one contribution for the Pro plan...
http://www.oscommerce.com/community/contributions,3716this is the second one....I havent gone through them both...or decided which I will do...havent gotten that far yet. LOL...hope it helps a little??
http://www.oscommerce.com/community/contributions,2679