Larry:
Here is exactly what I did. I went to this site and clicked on my home state. In our case it was Michigan. Then I found the address and sent them a letter, telling them I would appreciate a copy of my dad's discharge papers, and supplied my name, address, phone number, etc. Within two and half weeks, I had a copy in the mail.
http://www1.va.gov/directory/guide/home.asp?isFlash=1
I also have several helpful research links in our Research Section, including information on how to collect the unit records from the National Archives in Maryland, and the Army Corps of Engineers Office of History.
Let me know if you have any questions. I know I SURE did when I began. 
Oh, a very warm welcome. Sorry I didn't type more yesterday, but was working in my store and trying to throw in an reply to you.
Proud Daughter of Walter (Monday) Poniedzialek
540th Engineer Combat Regiment, 2833rd Bn, H&S Co, 4th Platoon
There's "No Bridge Too Far"