W32/HLLP.Philis.ini is a sub-set of the W32/HLLP.Philis virus. The *.ini variant is at this time ONLY detected by McAfee, and if you look at the description of the "virus" here:
http://vil.nai.com/vil/content/v_140656.htm
You'll see that it's not actually a virus that it's detecting, but an artifact of W32/HLLP.Philis. The _desktop.ini file can not contain the virus, it is merely potentially a record of the virus executing.
Looking at the _desktop.ini file included with the latest version of FROIS-01, there is a timestamp inidicating that Dexter2005 has been infected by the W32/HLLP.Philis virus, which prepends itself to .exe files.
The _desktop.ini file is NOT AN INFECTED FILE. It is only a sign that the system on which it was created is infected (and even then, only sometimes, there may be legit apps that create an _desktop.ini file). Since there are no .exes packed in a skin, this isn't even the beginnings of a concern.
However, any skin author that is told their skin is triggering this warning, they need to get their systems cleaned, because they might very well have the actual virus.