Here we go you left me no choice
http://portableappz.blogspot.c*m/201...tilingual.html
*fully* portable and done "the better way"
In this you find:
CalibrePortable.ini
[CalibrePortable]
CheckRegWrite=true
AllowMultipleInstances=false
Library=Users\user\Downloads\Calibre x64 portable\Library <

DisableSplashScreen=false
SplashScreenName=
Cheers
@kovidgoyal see that? Be inspired.