2014-08-06 Update: Apparently the recent Quake Live update broke QLHM, however I'm no longer maintaining the project due to a general lack of interest and the death of userscripts.org, upon which QLHM depended.

As an alternative I'd recommend checking out PredatH0r's extraQL project.

The QLHM source code is, and will remain, available at its GitHub location if anyone wants it. I've also attached two ZIPs: one containing the QLHM cache's userscripts, and another containing a dump of the QLHM userscript cache (which is in JSON and gives some meta info).