Who installs PHP on earthlink servers?



I asked a question earlier but got no responses..
My question is regarding my webhost earthlink..
is it their responsibility to install PHP on their servers or is it my responsibility :?: :?:
I got another host also and that is 8-95.com but in their cas PHP is already enabled when they start their hosting services...

Thanks in advance for your responses
I am using Earthlink. Lemme see if I can find out.

Anyone know how to configure PHP to work with Apache 2?
hey guys.. i got my question answered...
scripts must end with file.php4
i know this sounds elementary... but boy was this fustrating...

Thanks Guys for all your help...