HTTP Headers Help

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Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

Ok, not exactly on-topic but it does relate.
I'm trying to write a php script that passes a binary file through it
for download. This is to protect the file's true location (not web
accessible) and to allow my logger to log the transaction.=20
Unfortunately, the filename doesn't get copied. That is, the file to
download shout be x.tar.gz but I get download.php. Can someone help?
Note: I can't configure any of the services.
Note2: I know it's possible because I've seen other sites do it.

Thanks,
--=20
Bryce C <Plug@BryceCo.Net>
CoBryce Communications

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Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part

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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQA+Xade/wbq/C6yyPcRAvH4AKCpeVvTbPr79YpG/oc1Dg+8TmtDCgCfUW36
CdDfU5H3/WjUBNBcVz3z8gA=
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