Using PCI Cards With A Laptop?

Lardmonster asks: "My laptop is P3-750, 192Mb, large hard-disk. It would be ideal for games & LAN parties, except the graphics chip is an 8Mb S3 3D-Savage MX. These folks make a PCI to PCMCIA Adaptor, but prices start at $695! I could build a new rig for that! Anyone know any cheaper alternatives? I'd dearly love to be able to use a Voodoo3 PCI (or similar) with the laptop." Something like this looks promising, but is this really the answer for better graphics on a portable computer? Are there PCI cards that will not work well with this adapter?