Have seen a few posts in my searches here about a TSR (VEXP) that allows Toshiba laptops using the C&T 65550/65554 chipsets to scale DOS games to full screen. I picked up a Toshiba Portege 610CT that uses what I presume to be an older C&T F65546 chipset. The LCD has a native resolution of 640x480 but DOS games are letterboxed (640x400 linedoubled). Would there be any harm in trying the TSR to see if it works with this other chipset as well? Don't want to screw anything up. Thanks!