Maybe you should look at the datasheet and previous conversation before trying to help. LM75 is a digital temp sensor, not a analogue one.
I wouldn't mind seeing all the code again to see if I can figure out what's going on. I'm having trouble fitting the pieces that have been posted together. Pommie's code is using 9bits, which gives 0.5 deg resolution.
I'm using 11bits, but I don't need to convert to Fahrenheit so calculation is not such a big deal for me.