Do you have to search the registry for the event log files?
AFAIK, the eventlog files are located on %systemroot%/system32/config directory...
They have the extension .evt
If you find these "evt" files, you'll be able to find all the event log files in Windows.
Then you can think of using Win32::EventLog module to process them...
Try reading this,
eventquery.vbs
Might be of some help...