In fact, here's the MacNN story that directly relates to your problem:
"Adaptec has posted Toast 3.5.6 on its FTP servers, which adds support for the following drives: Yamaha CRW4416S, Yamaha CRW2216S, Teac CD-R56S, Plextor CD-R PX-R820T, Smart & Friendly CD-R6024, Traxdata CDR6240, Microboards Playwrite 8200. [servers are overloaded]"
ftp://ftp.adaptec.com/pub/BBS/PowerMac/
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Scott Stevenson
Contributing Editor,
MacN