strings from txt to .xml files

Hi,

i need help. i must do the script with instruction :

1. Create a folder structure with a few sub-folder ( manually )

2. Add some XML documents within child folders ( examples from internet )

3. Create a TXT file with a list of strings to search and the replacement separated by tab

4. Build a script that will find and replace those strings within all XML from, based on the values from TXT file (script can be Power Shell, or anything else but do not compile it so we read the code)

please help me. it's depends my future.