(SE v19):In the SE .dft file, do a saveas, and pick the options button. This plows you thru a whole bunch of steps to save the .ini file. I really aint too hip on SE, and ran into a few snags. I did a quickie save of the ini file to my desktop (wouldn't let me overwrite the original), and then just inserted the (converted) dwg file as a normal block. I'd suggest ditching the tiltleblock (if present) first in SE. I can't seem to get rid of it in ACAD.
But then, I'm a total noob w/SE.