Ok, I'll go in reverse order.
Audiograbber should be set to rip all your WAV files to a single folder and only do the final sorting when encoding to MP3. You set this up by checking the box that says "Use subdirectories only for mp3" on the main settings window.
Next, your rip settings should be set to ONLY rip to WAV and that's it. This is set at the very top of the MP3 settings window. ALSO check the box that says "Append ID3 Tag to WAV..."
Then you can do as many rips as you have space for and then do a mass drag to encode - with internal or external LAME support.
Now, onto your Plextor perplexities...
Did you install the driver I specifically mentioned in one of my previous messages? If not, grab that specific one. I had installed a different "new" driver and didn't have success until that specific one. But then I was limited to 8x max when having the problem.
In some speed tests I've seen on a hardware review site they claimed the Plextor was only getting them 16x. They were testing one of the middle tracks. By the middle of the disc I'm already doing at least 24-30x.
Did you mentioned what kind of computer you have? I'll go back and check it out. In case you didn't, I'm using an 850MHz Athlon with 512MB of RAM - not that it should make that significant a difference for this.
In your Audiograbber settings, choose ASPI (then you can try both ASPI and WIn2k calls - both are about the same for me), make sure your drive is correctly selected, make sure it's ID'd as SCSI-Plextor in the type field, select BUFFERED BURST and try a DAE setting of MAX.
Incidentally, my drive is identified as 1.13 (I can't remember if that's the bios version on it though...)
I didn't expect to get the DAE speeds I'm getting, but I was very pleasantly surprised when I did.
Bruno