Move txt file to with current date appended to filename

I have multiple txt files which begin with the word "orders" in folder C:\source. I need to move the files to folder C:\dest and rename them to "process_<date>_<count>"

So for example , if there are 3 files ordersa.txt , ordersb.txt and ordersc.txt in C:\source , after running the script I want these files to be in C:\dest with filenames process_12072011_01.txt , process_12072011_02.txt , process_12072011_03.txt

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