File /oname=bitmap.bmp "C:\pathto\bitmap.bmp"
File /oname=splash.exe "${NSISDIR}\Bin\UberSplash.exe"
ExecWait '"$TEMP\splash.exe" bitmap.bmp FADEINSTEP MILLISECONDSHOW FADEOUTSTEP'

FADEINSTEP and FADEOUTSTEP between 0 and 255

supports magiclime and the alpha fading
for a display and die.. [no fade]
ExecWait '"$TEMP\splash.exe" bitmap.bmp 0 MILLISECONDSHOW 0'
win95 and win98 just display for full length

To compile you must use the KOL library. You can find it here at http://bonanzas.rinet.ru/

code by vince
idea by snowchyld