Alternatively you can write a simple batch file, eg. mount.bat and put it to your desktop.
In this example you'll be prompted for the passwords to enter
start "" "c:\Program Files\BoxCryptor\BoxCryptor.exe" /multi /mountpoint w: /root d:\private
start "" "c:\Program Files\BoxCryptor\BoxCryptor.exe" /multi /mountpoint x: /root d:\documents
On a x64 Windows you need to use "Program Files (x86)" instead.