installing .iso image on ubuntu
 

hello friends. i have ubuntu installed on my VMware. i need to install an application - IT@School GNU/Linux ....however, i have difficulty doing this because i an new to linux. the application has 3cds, all in .iso images.

You can burn the iso images to physical discs using cdrecord, for example, or you can try if it works by just mounting them:
After that the contents of image.iso should be visible in /path/to/mountpoint directory. Some programs might be able to handle the image as if it was a real cd device, but that depends..usually you'll need to mount the contents.