You include a init.d script called "windows" in the wine package. I've slightly modified this script, so that it reads now configuration file /etc/sysconfig/binfmt_misc and can now register any file type. You may want to include it into the distribution.
Created attachment 49586 [details] the new binfmt_misc script
Assigning back to initscripts: The RFE is to replace the wine-specific solution with a generic binfmt_misc script (take a look at the attached file), and such a thing should not live in the wine package (while wine should use it).
Closing out bugs on older, no longer supported releases. Apologies for any lack of response. Please reopen if it persists on current releases. I disagree with the assessment posted above; registration should be done by the appropriate binary handlers that need it.