Install NSIS 2.46, the latest version.
Go to the example folder of NSIS and edit \"languages.nsi\"
Add arabic language support to the NSI file.
Build the example and test it on a Arabic MUI pack on windows 7.
Observe the Installer dialog:
1. Progress bar moves from left to right
2. Minimize, Maximize and Close buttons are on the right side of the dialog
The text display is also from left to right and is not proper when english and arabic text is mixed.
See the attached screen shot for reference. The same can be reproduced easily using the installed NSIS.