Particularly for Betas you genearlly have to download and burn 5 or 6 CD ISO's.

Once you've saved the ISO's on hard discs you can burn them to DVD-RW / DVD+RW when you wnat to install the Distro.

If you have spare DVD-RW/DVD+RW just burn each ISO to a DVD. You can then boot etc and install just like using CD's.

The advantage is that after you've installed the distro you can just "Wipe" the DVD's for re-use for something else.

Saves burning CD's.

If you need to use the ISO later then you can either mount a "Virtual CD" or just burn it again temporarily to a DVD.

For Betas I find this a good method -- why burn 20 / 30 CD's and then throw them away.

Also if you've run out of CD's then this is also a "get around".

I don't recommend using CD-RW's as the capacity of a CD-RW might not be large enough in some cases especially if the data is more than 700 MB.

Cheers

-K