2nd mon- bluetooth,? Firewire? or pci card?

Archived from groups: microsoft.public.windowsxp.hardware (More info?)

Attempting to use ONE computer as the main portal of
internet access and filing, allowing control of Spam,
antivirus protection, etc. Currently have a 2nd lcd mon
and IR keyboard/mouse in addition to the OE wired set.
So I want to set up a home 'workstation' where wife has the
2nd mon and RF setup, meaning she can work thru walls etc.
How will this easiest be done? I currently have no
Bluetooth or Firewire capabilities. Planned simply to add
PCI video carfd with 2 mon support but perhaps some FW
and/or BT could work.....
Having a small cased computer, two slots avail at best, its
one of those that looks like a large metal briefcase and
drives are mtd sideways.

TIA Larry