@meershaum
The ridiculous part is that the user, who doesn't know what he's doing goes ahead and does it anyway instead of stressing to the technical support person that he does not know what he is doing. Once he went ahead and did it, he (pardon the expression) screwed himself.
It isn't all that uncommon for some hardware/device vendors to tell you the "unofficial" way to do things. I have an ARQ 1-20 (
http://www.request.com) and while they don't support customers upgrading their own equipment, they tell you how to do it, and I have upgraded my own - twice - without fail. They do note that doing it yourself voids your warranty and you'll have to pay $$ for repairs that are result of your tinkering.
I assume that the person at Eyetech stressed that any warranties would be NULL and void if the installation/upgrade/swap was done by the customer, no?