Putting a 100gb 5400rpm or 60gb 7200rpm drive in a Dell Inspiron 1150?

Hi, i just got off the phone for the third time with Dell tech support.
They can be really accommodating when something dies within the
warranty but when it comes to tech knowledge they are lacking. I was
told 3 diff things by 3 diff representatives. I wanted to either put in
a 60gb 7200rpm OR 100gb 5400 drive to replace my intolerably slow/small
60gb 4500 drive. None of the answers the reps gave me told me i could
put either of these into the notebook i have, but because they were so
inconsistent i wanted to double check (or find out how i can double
check).

Does anyone know if either of those drives can fit in this model
notebook, or can anyone tell me how i can find out (without consulting
Dell).

Any help would be greatly appreciated!

Cheers

-Gaiko

PS Another reason for not using Dell would be that i can find both of
those drives for a ton cheaper (almost half the price) than i can find
them on the Dell site.

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