Hi,
so you can not say anything about the shx file?
Try from the Express Tools (READ THE HELP):
DUMPSHX
Converts existing SHX (compiled) files to the equivalent SHP (decompiled) files.
OR
http://usa.autodesk.com/adsk/servlet/ps/item?siteID=123112&id=2896848&linkID=9240617
But first, sava a...