Altering file associations

Hi,
Is it possible to create a sub class for a .hta file association so that a
fully provided name such as MYHTA.HTA would be able to use it's own desktop
icon rather than defaulting to the one assigned to the mshta.exe file that
executes it?

I want my .hta program to have it's own icon without having to change the
mshta.exe icon and have every .hta file come up with that custom icon.
I read something rather vague about sub classes overriding the default
association with a full filename rather than just extension.

If this is possible and someone could give me an example of what the
registry entry would look like I can write the code for my application to
test for and create the proper key. But hey, if you happen to have code
already....

Thanks in advance.
Trent