Upgrading a DELL Latitude Notebook 700MHz Laptop 128MB

I just bought a DELL Latitude Notebook celeron 700MHz Laptop 128MB. My
question are - can I
a)replace the cpu with a celeron 950 or 1000mhz
b) add another stick of 256MB centon or generic lapto memory PC100
c) What is the cheapest way of adding a NIC
d) Is there a cheap way of upgrading the VGA to more than 8MB
e) Are there issues of non compatiability that would crop up if I put
in aa higher than 10GB hard drive?

Thanks in advance