This is progress. What we now know:
1) You haven't (successfully) setup ide-scsi. But this may not be necessary if the direct ATAPI interface works OK.
2) When you use the ATAPI interface, cdrecord can see the burner as the ATAPI device 0,0,0.
ATAPI is a PC standard for SCSI command sets over the IDE bus - this is how IDE-based PC's talk to CD drives - by copying the SCSI standard command set for CD drives. The address 0,0,0 is an ATAPI SCSI-like device address. In the past the only way to do the full ATAPI command set was via the ide-scsi module which uses parts of the kernel's SCSI sub-system, but this is a hack. In kernel 2.4 the IDE driver can use ATAPI directly - I'm not sure which is more reliable - in 2.6 direct ATAPI is certainly more reliable, and I suspect the same is true in 2.4 - anyway there is help on setting up ide-scsi - but lets not go there unless we need to.
3) Your distro needs you to be logged in as root if you're going to use cdrecord. There are ways round this - but we'll leave that for now.
4) As root you could probably now burn a DVD-R of a directory by doing:
mkisofs SOMEDIRECTORY | cdrecord -dev=ATAPI:0,0,0
Or with DVD-RW
mkisofs SOMEDIRECTORY | cdrecord blank=fast -dev=ATAPI:0,0,0
Maybe you'd like to test this with a CD-RW.
But you probably want a GUI interface and you probably don't want to have to be root. The only GUI burner I've used is k3b, so I'll describe how to set it up on my system - your system may differ - but hopefully not too much. So start up a GUI session as a normal user. And start a GUI shell window - a konsole, xterm, or what ever you normally use - I'll assume its a konsole just so I can call it something.
First we need some background info - we need to know what IDE device correspondes to ATAPI 0,0,0. IDE devices are typically /dev/hda, /dev/hdb, /dev/hdc, /dev/hdd, etc.
We need to know which one of these is you burner. If you don't already know which one is you burner, in the konsole do the following:
And match you device model.
In the konsole, Start k3b, on the menu bar choose "Settings", under "Settings" choose "K3b setup", it will probably ask for you root password so that it can set up permissions. Give it the root password. You should then see the main K3b setup screen. On the K3b setup screen, on the bottom right of the "Devices" panel, click "Add Device..." . This will pop up a dialogue box asking for the device - you should enter which ever /dev/hd[abcd] that corresponds to your burner and click OK. You can also create a device for your cdrom drive - but it may have done this automatically. Now apply the settings and you're done.
K3b is similar to Nero. The only issue I have with it is that when I start a burn, I have to change the "Auto" speed option to "Ignore" - I think this is because by DVD burner is quite new on the market - so you might not need to do this.
If something goes wrong with any of the above - post the error message back here.