Scriptaculous Drop Guide Patch
Here is the patch for drawing a drop guide for script.aculo.us while drag and drop.
modified-scriptaculous-1.6.5.zip
modified-scriptaculous-1.6.4.zip
Scriptaculous 1.7.0 Patched Version
Scriptaculous 1.7.0 Patched Version 1.1 (bugfix)
Scriptaculous 1.7.1_beta3 patched
Scriptaculous 1.7.1_beta3 Patched Version 2 (markDropZone attribute is added, possible IE 7 bug fixed)