Format of PC Tools PCShell returned pointer list:
Offset	Size	Description	)
 00h	WORD	offset of WORD containing ???
 02h	WORD	offset of name of program to execute
 04h	WORD	offset of 80-byte buffer for ???
 06h	WORD	offset of buffer for ??? (length in WORD preceding buffer)
 08h	WORD	offset of buffer for ??? (length in WORD preceding buffer)