yes you can
when you fold - better to use the same folding name too
then points all go to one user name
(since you can only collect evga bucks for 1 member at each house/residence)
however if you produce enough to make both tiers and your wife or your kids want to race against each other you can have your own forum login and own folding name (just make sure your folding name is same as login - if you want it to show up on left hand side)
it be a good idea to use the FAH GPU tracker rather than the stanford clients
don't forget a passkey from stanford if you plan to use your cpu to fold SMP
and keep an eye out for folding contests..and have a chance at winning stuff