Tutorials for English speaking members, maybe this can help you more:
http://swtim.org/forum1/index.php?topic=18160.msg29826#new
Skip this if you burned the application and the language disk on CD/DVD:
How to install the program application:
Install the program Alcohol 120% (retail version within the archive) and create at least 2 virtual CD/DVD drives - in your case do the same with PowerISO. Save the images (.ISO files) of the application and the language disks in one folder on your HDD.
In the virtual CD/DVD drive Z: load the application disk.
Start the program
autorun.exe:

Click on
Install:

Click on
Run Installer:

Click on
OK:

Click on
Next:

Click on
Install:

Let the program install:

Click on the button
Done:

Skip this if you burned the application and the language disk on CD/DVD, just load the language disk in your CD/DVD drive and start the program:
The program is now ready to use. In the virtual CD/DVD drive
Y: load the language disk you want to use and start it with the option
Autoplay:

Click on
Run Rosetta Stone:

Now use the program and learn the language of your choice:



Skip this if you burned the application and the language disk on CD/DVD, just remember to start the program after you placed the language disk in your CD/DVD drive:
IMPORTANT NOTE: Open the program while using the language disks, do not start it separately. The application disk must always be loaded in the virtual CD/DVD drive before you use the language disks...