code:

---

$filer=dir(your_sdat_folder) $file="sdat0000.exe"
do
 if "sdat"=substr($filer,1,4) and val(substr($filer,5,4))>val(substr($file,5,4))
  $file=$filer
 endif
 $filer=dir()
until @error
? $file
get $

---