Some views of the bottom. At bottom with all of the removable sections partly removed. Clockwise from top right there is the CDROM drive, HDD bay, Floppy/Zip drive bay.
Here all of the removable modules are removed. Bottom left we can see the modem module with broken ribbon cable from a previous teardown I did.
If you want any more detailed pictures or info post a comment and I'll get some for you.