insert elements to xml file from another file

[nwebeeNsis]

Hi,

i want to know how to insert elements in XML file using NSIS. Lets say I have one big XML file file1.xml with parent, child ..... structure. and I need to add\insert various elements in file1.xml.I have all data to insert in other file(xml or text file Ex:file2.xml).

Is it possible to insert elements to file1.xml from file2.xml? Aim is installer will keep adding element to file1.xml from file2.xml whenever executed.

Thanks a lot in advance.