Merge Multiple XML Files using a batch file

I need to merge multiple (100's) of XML files into one file that I can import into a MySQL database.

There are two parts to this:

1) I need to add a tag for the file name
2) I need the output file to contain all the data plus the new tag for each file that is merged


So for example I have a directory that contains:
2009-09-08-09-21-29_115_112.xml
2009-09-08-09-21-29_115_112.wav
2009-09-08-09-21-03_7028691049_115.xml
2009-09-08-09-21-03_7028691049_115.wav
2009-09-08-09-18-03_100_112.xml
2009-09-08-09-18-03_100_112.wav

etc... I need the xml files combined and then a new tag called <file_name> created for each

So for the 3 xml files above the output would be:

  <recording_info>
  <recording_tag>All Record</recording_tag>
  <recorded_call_id>36329</recorded_call_id>
  <recorder_cid />
  <recorded_cid>Distribution <112></recorded_cid>
  <recorder_account_id />
  <recorded_account_id>1111</recorded_account_id>
  <from_account_id>1113</from_account_id>
  <from_caller_id>John Segrest <115></from_caller_id>
  <to_account_id>1111</to_account_id>
  <to_caller_id>Distribution <112></to_caller_id>
  <duration>99</duration>
  <date_created_ts>2009-09-08 09:21:29.617108</date_created_ts>
  <date_created_secs>1252426890</date_created_secs>
  <file_name>2009-09-08-09-21-29_115_112.wav</file_name>
  </recording_info>
  <recording_info>
  <recording_tag>All Record</recording_tag>
  <recorded_call_id>36328</recorded_call_id>
  <recorder_cid />
  <recorded_cid>John Segrest <115></recorded_cid>
  <recorder_account_id />
  <recorded_account_id>1113</recorded_account_id>
  <from_account_id>0</from_account_id>
  <from_caller_id>GAGE AND GAGE L <7028691049></from_caller_id>
  <to_account_id>1113</to_account_id>
  <to_caller_id>John Segrest <115></to_caller_id>
  <duration>36</duration>
  <date_created_ts>2009-09-08 09:21:03.232146</date_created_ts>
  <date_created_secs>1252426863</date_created_secs>
  <file_name>2009-09-08-09-21-03_7028691049_115.wav</file_name>
  </recording_info>
  <recording_info>
  <recording_tag>All Record</recording_tag>
  <recorded_call_id>36327</recorded_call_id>
  <recorder_cid />
  <recorded_cid>Kimberly Miles <109></recorded_cid>
  <recorder_account_id />
  <recorded_account_id>1107</recorded_account_id>
  <from_account_id>1107</from_account_id>
  <from_caller_id>Kimberly Miles <109></from_caller_id>
  <to_account_id>-1</to_account_id>
  <to_caller_id>95475425</to_caller_id>
  <duration>160</duration>
  <date_created_ts>2009-09-08 09:18:34.037292</date_created_ts>
  <date_created_secs>1252426714</date_created_secs>
  <file_name>2009-09-08-09-18-34_109_95475425.wav</file_name>
  </recording_info>


The original XML file contains everything EXCEPT the <file_name> line. The file name is always the same as the XML file name except that the extension is wav (always)

Then i need the original xml files either deleted or move to a different location like a bak folder or something. All the files are in the same directory and will remain in the same directory.