Int 31 Fn FF2A  P - Causeway V1.3 - "cwload" - Load Another Causeway Prog  [E]

   AX = FF2Ah
   DS:EDX -> filename

Return: CF clear if successful
       CX:EDX = CS:EIP of entry point
       BX:EAX = initial SS:ESP for program
       SI = PSP for overlay program
   CF set on error
       AX = error code (01h file error, 02h not a 3P file, 03h no memory)

Note:  the returned PSP can be given to "RelMem" (AX=FF0Fh) to release the
     overlay's memory and selectors; only selectors and memory allocated
     during loading will be freed by RelMem unless one switches PSPs with
     INT 21/AH=50h

See Also: AX=FF00h,AX=FF24h