You need some script to edit those files and replace strings with what you want. When we were using another client i had a vbs script, which modified settings xml file. But i wasn't running it on every user's PC as we had settings files stored on the server and every settings file was in its own folder (that's why script is going to subfolders, you don't need that part probably). But you can probably modify it. Here's that vbs script:
Const ForReading = 1
Const ForWriting = 2
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objFolder = objFSO.GetFolder("E:\SomeFolder\")
RepSubfolders objFolder
Sub RepSubFolders(Folder)
For Each Subfolder in Folder.SubFolders
Set objFile = objFSO.OpenTextFile(Subfolder & "\settings.xml", ForReading)
strText = objFile.ReadAll
objFile.Close
strNewText = Replace(strText, "<server>192.168.12.41</server>", "<server>jiveserver</server>")
Set objFile = objFSO.OpenTextFile(Subfolder & "\settings.xml", ForWriting)
objFile.WriteLine strNewText
objFile.Close
Set objFile = objFSO.OpenTextFile(Subfolder & "\settings.xml", ForReading)
strText = objFile.ReadAll
objFile.Close
strNewText = Replace(strText, "<srv>false</srv>", "<srv>true</srv>")
Set objFile = objFSO.OpenTextFile(Subfolder & "\settings.xml", ForWriting)
objFile.WriteLine strNewText
Next
End Sub