MySQL-NT is crashing frequently
I would upgrade away from MySQL 5.0 altogether.

Please note you are using mysqld-nt.exe

It has been a very long (probably over 1.5 yrs) since the NT-featured mysqld was distributed. The only benefit to using mysqld-nt was if you are using shared memory or named pipes, which were just nuances when MySQL 5.0 came out for Windows.

The MFC C++ runtime distributables have been updated several times over the years. If you have been running updates against Win2003, things are probably very different for mysqld-nt.exe now.

Before upgrading, try using mysqld.exe instead of mysqld-nt.exe. If you still get the same crashing behavior, switch out of MySQL 5.0 for Windows and go to MySQL 5.5 because MySQL Support for Windows 2003 went EndOfLife back in April of 2011. I would also think about using a Windows 7 Server instead of Windows 2000/2003/NT.