Using Mime Types Extended plugin you can extend the allowed Mime types from WordPress media upload dialog box. It supports dwg, asd, asn, tsp, dxf, spl, ptlk, hqx, mbd, mif, hlp, chm, bin, dll, oda, ai, eps, ps, rtc, smp, tbk, vmd, vmf, shtml, xhtml, xml, bcpio, z, cpio, csh, dcr, dir, dxr, dvi, evy, gtar, hdf, php, phtml, latex, bin, mif, nc, cdf, nsc, sh, shar, cab, spr, sprite, sit, sca, sv4cpio, sv4crc, tcl, tex, texinfo, texi, t, tr, roff, man, troff, ustar, au, snd, es, tsi, vox, aif, aiff, aifc, dus, cht, mid.
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