Hi guys,

HEEEELLLP!
Using Windows batch scripting I am trying to rename all files in a folder.
Here's an example of what I'm trying to achieve:

filename_1234.txt to MONDAY_1234.txt
filenamea_9876.txt to MONDAY_9876.txt
filenameab_2222.txt to MONDAY_2222.txt


so basically I want to replace the old file name (which is variable length) with a fixed name for all files but keeping the numbers after the '_' . This has to be done via a batch script- using no other languages or utilities.
Any ideas??