Powerstore Change gateway to First Data

Hello.

I am hoping someone might have some helpful info about changing the payment gateway
options from authorize.net and paypal to FirstData.

More specifically..

I have followed the steps provided in the pdf documentation on this topic.

...Deleted the ecart authorize.net and paypal server behaviors and the specified code from
the confirm.php page.

Thoroughly checked that the deleted server behaviors and code lines are the right ones.

The problem starts with the next step which is to insert ecart local checkout server behavior

I get an error that says that i must have a site defined and an ecart object available.

so... site defined. I thought i had that covered. The first thing i did was set up a new site
in Dreamweaver CS4. Then i moved all the files and folders into the root directory of the new site. ( I tried it first in a subdirectory which had the same results. )

From there, i began to edit the confirm.php page.

Im running a Windows7 PC
Xampp
created site with PHP MySQl as testing server
created an empty database in mysql local
created a database connection local

I am trying to set up the PowerStore on my Apache local testing server
or whatever way will allow me to make css changes and then put the files to the live server.
Also, and most importantly i must set up my FirstData API Certificate and change the
purchase gateway options to First Date.

Any help would be greatly appreciated. Thank you.