Burn an ISO and making a multisession disc

[mpg198]

Say I have an Ubuntu Remix that's only 300 MB. Normally when i burn it to a 700MB CD-R the extra 400 MB is wasted. Is there a way I can burn a multisession disc from an ISO?

I tried using this command once but it didn't work.

cdrecord dev=0,0 -v -eject speed=16 fs=16m -multi clonezilla-live-1.2.2-31.iso
wodim: No write mode specified.
wodim: Asuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
TOC Type: 3 = CD-ROM XA mode 2
wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.scsidev: '0,0'
scsibus: 0 target: 0 lun: 0
WARNING: the deprecated pseudo SCSI syntax found as device specification.
Support for that may cease in the future versions of wodim. For now,
the device will be mapped to a block device file where possible.
Run "wodim --devices" for details.
Linux sg driver version: 3.5.27
wodim: No such file or directory.
Cannot open SCSI driver!
For possible targets try 'wodim --devices' or 'wodim -scanbus'.
For possible transport specifiers try 'wodim dev=help'.
For IDE/ATAPI devices configuration, see the file README.ATAPI.setup from
the wodim documentation.

[reed9]

Linux: Burn multi session CDs on Linux

Brasero supports multisession burns, according to the website, if you want a GUI.

[mpg198]

Does it support multisession when burning ISOs though? Lots of burning programs support multisession, but when you burn ISOs they close the session.