You also need to make sure that you have the latest version of Jet because there are some security messages involving sandbox mode also. Jet can be downloaded from the Microsoft download site.
This will take care of the SandBox mode [registry key] for Windows XP and Access 2003 [once you have the latest version of Jet]...
Code:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Jet\4.0\Engines]
"SystemDB"="system.mdb"
"CompactByPKey"=dword:00000001
"PrevFormatCompactWithUNICODECompression"=dword:00000001
"SandBoxMode"=dword:00000002