Right-click any suitable directory (resulting file will be stored there), select "Actions -> Manage ISO -> Create ISO-image from CD-ROM" and select the name of ISO image in the filename selection dialog. Warning: Check if you have enough free space on target partition before creating an ISO! Image will be created either in parent directory of this folder (if user is allowed to write there) or on the Desktop.
Right-click a folder that you wish an ISO or UDF image to be created from and choose "Actions -> Manage ISO -> Create ISO (or UDF) image". Right-click an ".ISO" file, choose "Actions -> Manage ISO -> Calculate MD5 sum" and wait for completion - it may take several minutes for a standard 650 Mb image on a slow machine. The corresponding folder will be removed from the desktop automagically. Right-click an ".ISO" file and choose "Actions -> Manage ISO -> Unmount Image". Image file will be mounted to folder on Desktop, the corresponding folder will be opened and raised. Right-click an ".ISO" file and choose "Actions -> Manage ISO -> Mount Image".
Note: If you prefer to use sudo, you should first choose to "Setup sudo config" in installation menu. During the installation you'll be offered to choose a variant to use. Mount/unmount operations can be performed in two different ways: using kdesu or sudo. Mount ISO Image is an advanced script which allows to perform multiple operations with ISO, NRG (Nero Burning ROM), UDF (DVD), CUE/BIN, CCD/IMG/SUB (CloneCD), XDVDFS (XBOX) images.