VESA is a standard for video graphics adapters,  allowing programs
such as sprite burner to use HI-RES SVGA graphics without a specific
driver for every video card.  Not all installations of Windows may 
support VESA,  but most do.  If you get a "VESA not supported" error,
you need to obtain a VESA driver.  I highly recomend UNIVBE.EXE by
SCI-TECH software,  or VVESA.  Sadly,  I cant distribute a copy with
Sprite Burner II due to copy right laws and such... :(