First off I would like to thank you from the bottom of my heart, I was getting down right frustrated by seemingly hopeless search. I have not tried to contact the Army Corps History Office, can they help? Here is what i have done:
- spent countless hours on the internet, searching, looking, waiting 
- Contacted the NARA and recieved replacement medals and discharge papers
- Contacted Modern Militay records and ordered copies of the general orders of the 334th and the 762d.
- I also have a list, written by Grandfather during WWII, of all of the men in his unit, from this list I have written letters to each of the men, with no response.
- The one thing that I have in quanity is his letter from his time overseas. From these I can tell he spent alot of time in Iran, but his children(my mom) swear up and down that he was injured in the Battle of the Bulge and the memories of Dachau haunted him his entire life. My question to you is: am I going about this all wrong? and is there anything that I could be overlooking, like a number on his discharge papers or a on the letters?
thank you so much! you have no idea how much this means to me
Brian 
On 4 December 1942 the Regiment arrived in Iran. They worked under the Persian Gulf Command, mainly as a construction regiment that helped maintain and construct supply roads, vital to the Russian Front. The Regiment left Iran in January of 1945 and was assigned to the Continental Advance Sector from 1 March 1945 to 10 June 1945. During which time the Regiment recieved battle credit for the Rhineland and Central Europe Campaign. Following these battles the Regiment built a combination railroad / highway bridge over the the Rhine at Mannheim and Ludwigshafen..... thats what I have so far