Map exporting is converting the original maps into a format that can be edited by MilkShape, 3DMax, etc.
The plan is for SparkEdit to export the data to MilkShape, tweak the verts using Milkshape, then import it back to SparkEdit. Then SparkEdit will alter the existing cache file with the new verts.
The bottom line is that you will be able to alter existing maps!
Grenadiac