We did the same. Took out the heavy, clumsy door. and put up a curtain on the track I also found some other uses for the track, like mounting an adjustable platform for a DVD, and/or satellite receiver.
For the past two weeks we've been camping in a friend's Airstream that still has the folding door. Their camper is a 25 footer, and the door (same size as the Bambi's door) was concealed out of the way when closed, but I still missed the convenience of being able to close the curtain from either side.
If I recall, the only tricky part is undoing one end of the track and moving it aside, so you can slide the accordion door out. It's been a while, but I don't recall using anything other than a screwdriver.
1968 Trade Wind
2007 Ford F250 4x4 Crew