I scanned the WinNT5 MassStorage v11.09 here --> https://www.virustotal.com/url-scan/rep … 1318827737
Click "View Downloaded File Analysis" here --> https://www.virustotal.com/file-scan/re … 1318834947

Clean as an ultrasonically-cleaned whistle.  End of controversy, that is unless someone scans the rest & finds one.

As for "unscanable viruses", of course you can scan them. You just have to finish downloading them, first, as you would have to do with .7zs, too (in fact, once the DL is finished, you will end up with a .7z file anyhow, so no difference there...).
Rest assured that downloads presented on our site are of course as clean as possible!

We had direct downloads at one time they were donated by generous CDN providers. They decided that the ROI on us was not good enough (no conversion). We routinely use about 10~20 Gigabytes a month of bandwith. Users are greedy they want to download the packs for free but are unwilling to donate or to purchase services from our sponsors. the bandwith we use would cost over $1000.00 USD a month. That a lot more money per month than we recieve in donations in a years time.  No "free" service allows that much bandwith for free... check it out for yourself. they all will pull the links when you exceed a predefined data limit, or charge you.

Torrents are the only way we can deliver hundreds of thousands of downloads per month for free. Unless you want to buy our bandwith.