Question about a Linksys all-in-one device

I'm considering the Linksys WCG200 for my home network. Short form, it's a wireless G router with a built-in cable modem.

Here's some details from the official Linksys page...

• High-speed DOCSIS 2.0 certified Cable Modem gives you a fast, "Always On" connection to the Internet * Share the Internet -- connect one PC to the integrated Router via USB and four more via Ethernet using the built-in 10/100 Switch * Built-in Wireless-G (802.11g) Access Point lets you connect more PCs without running wires * Advanced SPI firewall and wireless security features protect your PCs, your data, and your family

I have two questions.

2) If you can't do this normally, is there maybe custom firmware out there that will let you do this?

Gwen