Enjoy, qpieus! I think Wine defaults to Windows 2000 after installation. As you've seen, Windows 98 is better to run CDSpeed.
Here's CDSpeed on Xubuntu 7.10 with just an internal PATA drive installed. Default installation with Wine 0.9.46 from repo's (apparently using ide-scsi on this old i440LX PII mobo - posting from it now

).