Check out scim-anthy source tree and create iimei one.
Especially figure out the purposes of all non-source files.
To check out:
$ cvs -d cvs.fedora.redhat.com:/cvs/pkgs co rpms/scim-anthy
$ cd rpms/scim-anthy/devel
$ make prep
$ cd scim-1.2.4
Findings should be archived to the wiki also.