Help, server doesn't start

We have an old postgres installation (8.3) running on windows 2003

The server run perfect for many years but today it crash L

We have a very old backup so I'll try desperate to repair.

If I can't repair I want to skip the error and start server with only
healthy data, no matter if I lose some table page, entire table or even
entire database because the server has many databases inside.

Currently the database is not starting, when I try to start I got the in the
log:

2012-06-25 02:22:33 GMT LOG: database system was interrupted while in
recovery at 2012-06-25 02:22:26 GMT

2012-06-25 02:22:33 GMT HINT: This probably means that some data is
corrupted and you will have to use the last backup for recovery.

2012-06-25 02:22:33 GMT LOG: database system was not properly shut down;
automatic recovery in progress

2012-06-25 02:22:33 GMT LOG: redo starts at 17C/E1C42040

2012-06-25 02:22:33 GMT LOG: loaded library
"$libdir/plugins/plugin_debugger.dll"

2012-06-25 02:22:33 GMT FATAL: the database system is starting up

[LAST TWO LINES REPEAT MANY TIMES]

2012-06-25 02:22:36 GMT LOG: startup process (PID 1120) was terminated by
exception 0xC000000D

2012-06-25 02:22:36 GMT HINT: See C include file "ntstatus.h" for a
description of the hexadecimal value.

2012-06-25 02:22:36 GMT LOG: aborting startup due to startup process
failure

2012-06-25 02:22:36 GMT FATAL: the database system is starting up

2012-06-25 02:22:36 GMT LOG: loaded library
"$libdir/plugins/plugin_debugger.dll"

2012-06-25 02:22:36 GMT FATAL: the database system is starting up