How do i change from XSL style sheet and XML?

[immortals84]

I want to add the "new mod pack" with all those new civilizations created by that civarmy s 1994 guy. Now i used to do alot of adding stuff for civ3. So i figure i just copy and paste the xml data from the assets/XML/Civilizations/CIV4CivilizationInfos out of the New mod pack folder into the CIV4CivilizationInfos already in the game. But when i open CIV4CivilizationInfos out of the New mod pack folder i get this error message:

The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later.


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Error opening input file: 'CIV4CivilizationsSchema.xml'. Access is denied. Error processing resource 'CIV4CivilizationsSch...


WHAT DO I DO?!?!?!?!?!