Fred,
You can find some great Autocadd tutorials on the internet.
Go to the View tab >Display>UCS Icon> tick the ON and Origin. The USC Icon will now be at 0,0,0.
To move the profile, select everything, r mouse click MOVE, snap to the beginning of the profile, then in the comand line type 0,0,0
for where you want to move the selected items to be moved to. If you snapped correctly to the beginnng of the profile it should now be moved
and you will see the USC icon at 0,0.
RICH