http://bugs.winehq.org/show_bug.cgi?id=22233
--- Comment #2 from A Wine user RandomAccountName@mail.com 2010-04-01 10:45:33 --- (In reply to comment #1)
("The cdbxp_setup_4.3.0.1991.exe file expects a newer version of Windows. Upgrade your Windows version").
Hi, this bug is about an older version (3.0.116, from the link provided here) which is Windows 98-compatible. My reason for testing this is because it's the last version which doesn't use .NET, and it seems closer to working well in Wine than the newer versions.
As for why one would run it in Win98 mode to begin with: this app is affected by bug 12359, but running in Win98 mode is a workaround, as it uses ASPI instead of SPTI in Win98.