[QUOTE=sailermon;35463]Yes, you are correct, I didn't explain myself adequately.
I was asking that if you did extract and compress to .iso for some reason, could you compress it again when burning to disc?[/QUOTE]
I'm not sure where are you going with this, but yes, you can compress second and third time if you want. Would I suggest doing that - no. Every time you doing compression, quality of your content deteriorates in geometric (literally) progression. If your second compression is for use with iPod, or Phone, or similar mobile device with screen inch by inch kinda size, most of the people finding quality of second process acceptable. But if you want to stretch your second production over 54" plasma, you will be very disappointed.