when I connect to main shared ip http 66.66.66.66 lets say... one of my acconts is being open .. where can I controll which one? thx

you should have assigned the IP to that account see from your WHM if you are using Cpanel

you dont understand. this is SHARED IP. so there are hundrets accounts on it.. but without a domain park.. using shared IP in IE.. only one of them is being open.. which one? how to specify that