One of the easiest ways to do what you wish is to use NERO...

Just use the Burn Image function... You may need to enable the 'geek' view of the interace instead of the mom and pop dumbo default !
When you select the Burn Image function you will be prompted for the name and location of the .iso file(s)... One at a time, and (please) don't do anything else while the burn takes place... Give it a chance with no browsing or music playing or whatever !!!

Many of the apps out there are quite happy to be installed FROM CDs that you have burned from .iso - and then you must configure the no-CD capability.