Option-space works like option-opening: it opens the selected file or folder and then closes the window containing it. If shift is held down, Open Spaces does nothing; this way shift-space can do what space used to do (select the item in a folder which comes first alphabetically).
Open Spaces is freeware, though not public domain. Copyright 1993 Samuel Kutin. All rights reserved. Open Spaces may be freely distributed, provided it is accompanied by this documentation. It may not be altered in any way without the express written permission of the author. No fee (other than standard downloading fees) may be charged for the distribution of Open Spaces; it may not be distributed on disk for profit without the express permission of the author.
Known Conflict
Open Spaces does not work when WindowWizard 1.1 is active. This is due to a
minor error in WindowWizard, which the author has said will be corrected in
future releases.
Acknowledgements
Thanks to Paul Philipsen, Robert Cunningham, and Jim Walker for their help in
tracking down problems with version 1.1, and to Eric de la Musse for helping me
work out the conflict with his program WindowWizard.