Found this while roaming the Audiograbber Forum. The posting is from 2001, so it may be outdated:

"Winamp stores disc informations in in_cdda.cdb and this file is not a plain text like discs.txt. My program can convert them. Try [url]http://webclub.kcom.ne.jp/ma/takabin/test/[/url] . This can convert in_cdda.cdb to discs.txt always, but discs.txt to in_cdda.cdb converting requires CDDBID and "frames=" key in discs.txt."

(Source: [url]http://www.audiograbber.com-us.net/boards/ubb/Forum1/HTML/001430.html[/url])

The above mentioned program may be your missing link. Rip in WinAmp, convert disc info to discs.txt and then import into an application that can read discs.txt. ...

Maybe it works, who knows...