Here is a
TO&E for the 100th ID. It should be roughly the same, except for the formation numbers. Click on the symbols to look at the constituent parts.
Here is the regiment specifically
http://www.100thww2.org/100org/infreg.html
click on each symbol to see the smaller formations.
elememnts of the 29th ID
Infantry Regiments
115, 115, 175
Field Artillery Battalions
110. 111, 224, 227
Signal Company
29
Ordnance Company
729
Quatermaster Co
29
Cavalry Recon Troop (Mech)
29
Engineer Battalion
121
Medical Batt
104
CIC Detachment
29
There were a large number of smaller units attached at different times