Originally Posted by MohammadAG

Right, try this.

Code:

#! /bin/sh -e

Q=`run-standalone.sh zenity --question --text="Install custom transitions?" --ok-label=Yes; echo $?`

if [ "$Q" = "0" ]; then
      # install the custom things
      echo "User chose yes"
else
      # do not install the custom things
      echo "User chose no"
fi

Haven't tested the script cause I'm not on Maemo (on Ubuntu atm) on the N900, but it works on my PC
Hope it works