Sam,
As a new user also, I wanted to welcome you. I, too, am a grandson of a 292nd Engineer, H&S Co. veteran and have also had difficulty in finding much information on the unit. My Grandfather, Randall Gates, volunteered for the Army at the beginning of 1944 despite the fact he had four young sons to support. He came to Europe in Dec of 1944 with the rest of the unit as a mechanic (he was an auto mechanic in civilian life). We have letters that he sent home giving us some info on his service (subject to censoring) and was injured twice, once in a truck accident and once in the bombing of a building that he was in.
Thanks so much for posting the photos that your grandfather took of the unit. They are truly a treasure and makes me feel like I can understand my own grandfather better (he died back in the 70's when I was just a youth). In fact, I believe he was captured in one of the photos you posted entitled "The motor pool gang" (left soldier of the three kneeling).
I would be interested in any information that you may have on the unit (letters, interviews, etc.) and would welcome the chance to exchange anything that I and my siblings may have. I am so happy that there are others searching for info on this little documented unit and the men who were assigned to it.
I am so thankful to have found this forum and you post and for the honor to be able to post and contribute. Thanks.
Proud Grandson of Randall Gates
Mechanic, A and H&S Companies, 292nd Engineer Combat Battalion, 1149th Engineer Combat Group