Usually multisession discs are burned by a private user; then they don't contain copy protections. So, to copy a multisession disc is not necessary to use CloneCD: it is sufficient to copy all files on HDD and then burn on a new CD. If your system is fast enough, you can do an "on-fly" copy using nero. Choose a slow speed to do an "on-fly copy" (max 8x) to avoid too many buffer underrun during burning.
If you want to do a try only to avoid to waste a disc, you can choose use a rewritable to do an "on-fly" copy.
Hope this can help