Have you considered using an INI file, instead of a text file? The built in INI functions of kix would make this much easier.

flag.ini
 Quote:
[FLAGS]
acceuilorigine = "http://www.google.com"
newacceuil = "https://mywork.com"


KiX Script
 Code:
$flagFile = @ScriptDir + "\flag.ini"

If Exist($flagFile)
   $acceuilori = ReadProfileString($flagFile, "FLAGS", "acceuilorigine")
   $newaccueil = ReadProfileString($flagFile, "FLAGS", "newacceuil")
Endif

? $acceuilori
? $newaccueil

get $