First, let me say that I have no clue about the VS2000 or the 1680, but- I know
the VS1824CD like the back of my hand. So- I'll talk you both through it on an 1824 on the chance that the operating systems are similar. My apologies if it doesn't work.
First, you have to have 2 channels recorded in 16bits/44.1kHz. If you recorded in 24 bits *you can't do it*. If you just have 2 tracks, fine, otherwise, you have to create a stereo "master" track. To do this, go to "mastering room" with CDrec mode "on"- (this will save you time later) Record/play set for "rec", Switch "on". The master tracks will be the highest numbered V-tracks you have. In my case, that's 17-16 and 18-16. Make sure all the tracks you want to record are enabled (green). The mastering tracks should light up red. Push record and then play, and set master levels however you want them. When you are done, hit "song"/"optomize". Note- once you do this, "undo" *will not work*. All previous versions are gone. Then save it! On my machine, that's shift/zero. Optomizing before you save deletes all of the various versions you went through in editing, and saves tons of hard drive space. If you want to hear the mastering tracks, set the rec/play button in the mastering room to "play" with switch "on". In this mode, you should see the master tracks on the screen, and the only fader that should work is the master fader.
Then, go to "mastering room" and hit CD write "CDWt" (CD write). Insert a *Japanese* CD-R, such as Taiyo Uden/Microboards. Rolands are notorious for hating non-Japanese CD-R's, and half the time they won't record on Maxell's, Sony's, or anything else. It should bring up the CD-write screen. Hit "select track". Use the arrows and the jog wheel and go to the master tracks (in my case, I go to 17-16 and hit sel L and 17-18 and sel R). Then hit "back" which will take you back to the CD write screen, and now shows the selected tracks. If you are just burning a stereo recording on tracks 1 and 2, , you would select 1-1 and 2-1, and no "master" tracks would be necessary. Select "track at once", whatever speed you want (2X, 4X, etc.). Set finalize "off" if you intend to record other songs on the same CD, or "on" if you want to be able to play the thing on a regular CD player. You can play it on the Roland even if it's not finalized. If you want to finalize it later, there is a "finalize only" option.
Then hit "execute" and it will start asking you if you understand all the legal hooey about copyright. Tell it what it wants to hear-yes,yes,yes, etc.
It will then say "converting"- this is already done and will take 2 seconds if you did the master tracks in CDrec mode as suggested above. Otherwise, it will now make a redbook compliant copy in real time, however long the song is. Then it will say "writing" and show you what percent is done. When it is done writing, it will say "finalizing", which will take about one minute, and then hopefully, it spits out a finished CD.
Hope this helps you with your machines, which are different than mine, but I'm betting that VS-BS doesn't change that much over time. Let me know if it works. If not, go to VSPlanet.com, and somebody with the exact same machine will talk you through it. Good luck-Richie