Checking md5sums is something that is typically done from the command line, both in Linux and Windows. If your iso is on your desktop, you open a terminal and type:
md5sum /home/username/Desktop/(name of the iso)
In windows (if the iso is right under C: ) :
- find the "run" option on the menu
- type cmd
- cd \
- md5sum (name of the iso)
Note: windows does not natively support md5sums; you would first have to download a little md5sum application from the internet and place it in the same directory as your iso
In both cases, the command line will return a string of numbers and letters. This needs to be compared with the md5sum that can be found in the place where you got the iso (some md5sum file). If there are multiple isos, make sure you go for the md5sum that matches your own. if the two are identical, you have success.
BTW , why do you need to know what is on the cds? I'm afraid I don't see the point of this.