Give 16-bit apps their own separate processes

By default, Windows XP will only open one 16-bit process and cram all 16-bit apps running on the system at a given time into that process.
This simulates how MS-DOS based systems viewed systems and is necessary for some older applications that run together and share resources.
However, most 16-bit applications work perfectly well by themselves and would benefit from the added performance and stability of their own dedicated resources.
To force Windows XP to give each 16-bit application it's own resources,
in run Menu Type Regedit
browse to
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\WOW
and find the String "DefaultSeparateVDM".
If it is not there, you may need to create it.
Set the value of this to Yes to give each 16-bit application its own process, and No to have the 16-bit application all run in the same memory space.