oscommerce eway gateway and Microsoft XML 2 or 3

Can someone help me out here? I have a potiential customer who wants to run oscommerce with the eway.com.au gateway. The oscommerce website gives the following requirements.

eWAY payment module

eway payment Module is a payment module for the osCommerce open source e-commerce shopping cart, which enables credit card processing via eWAY Profession XML solution. You must need SSL certificate to be installed and Microsoft XML version 2 or 3 (3 preferred) to be installed on your web server to run this module.
I have no idea what Microsoft XML is and whether I can configure Apache or "install" this requirement. I am running an Apache/cpanel server on redhat.

Any help is appreciated.

 

 

 

 

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