Windows XP 32 and 16 bit

Hello,

I just installed an XP Home Edition (original CD) on a new 160GB hard drive in my Dell Dimension 1100/110B. (Alureon.e partially damaged my previous Windows installation)
XP is indeed 32-bit (checked in Dxdiag) but does not recognize the onboard Ethernet card and also seems not to see the onboard video card since it only gives me the option for 16-bit display; the same goes for sound (the device manager shows ? for all three). However, if I put back the old 80GB hard drive, they all work fine.

Any suggestions?

Thank you ;-)