It's impossible. ProE does not work backwards. At the last seminar I went to the guys from ProE told us that the new "Wildfire" next major release will work on previous releases of ProE. So the answer is to upgrade to the lastest release of ProE which is higher than 2001.
Question: Are you trying to draw (sketch) in the drawing mode or create in the 3D model mode? What version of ProE are you using?
The circle, line, etc. can be sketched in drawing mode and then selected with the mouse to modify or stretch/drag it to another size. If you dimension the...