INT 15 - HP OmniShare - STANDBY.COM - PREPARE FOR UNINSTALL                     
	AX = BA25h
Return: CF clear if successful
	    AX = 25BAh
	    BX = PSPsee Program Segment Prefix of STANDBY.COM resident portion
	    DX:CX -> previous INT 15 handler
	CF set on error
Note:	This function is used internally by the STANDBY.COM /u option, and
	  should not be used by application programs.
SeeAlso: AX=BA20h