Would command line tools to view the audit help you? If so, then I would recommend acat and showaudit. You can view the man page for both to give you all the syntax. Let me know if you would like to go this route and I can help find more documentation about the commands. Also you may want to search the KB for "sacap filters".
As for the "freespace override" you are seeing, I think that might be due to a partition being full on the firewall. Running the "df" command may point out which partition.
The Admin Console has a hardcoded timeout of 5 minutes (when it receives no response), that is why it is timing out.
You can export the audits using SCP or FTP; you can export them in multiple formats (ASCII is one) on a regular basis. That exports the entire audit.raw file from that day.
If you run the acat command on the CLI it will be much faster than doing this through the GUI (you can then use a SACAP filter [Sidewinder audit capture] to get only the information you want).
You also need to upgrade to 70103 as 70102 is End of Support next Tuesday, 09/30/2013.