How can I disable my wireless router to a wired router. The model is a Linksys WRT54GS.My two computers are now in one room and do not need to be wireless.I will be using a 50ft. Cable. Does it make any difference if the color of the cable is blue or yellow ?

From what I know, the color of the cable doesn't really matter. But I could be wrong.
As long as it's the correct networking cable it should be fine.

What can sometimes cause grief is if a crossover cable is used. If your computer or the router has an auto (MDX) (Spelling?) port then there is no trouble.

Colors of cables were designed to be color coded by backbone, vertical riser and patch. None of this concerns you.

Check the manual to disable wireless.

Colors of cables were designed to be color coded by backbone, vertical riser and patch.
Really? I didn't know that. Can you provide a reference?

Recommended Color-Coding Scheme - Siemon (http://www.siemon.com/us/standards/13-26_recommended_color-coding_scheme.asp)

You'll see that Station Cabeling is Blue (Horizontal terminations)

You don't have to do anything the router. If there are no computers seeking a connection then the wireless part won't be used.You can disable the wireless JNIC on the computer that used to be wireless.

I would, however, set up MAC address filtering so only selected MAC addresses can connect. This will inhibit people nearby from connecting to your router.

Color coding of cables is a guideline. It makes sense in large installations, but its not necessary for a home situation. But the cables are not different.

I've seen ALL colors used for networking, and red or yellow for crossover. Yellow or red could be either. Look at the ends(wire colors at ends)
Google Image Result for http://www.archonmagnus.com/computing/elec/diagrams/crossOverCableDiagram2.jpg (http://images.google.com/imgres?imgurl=http://www.archonmagnus.com/computing/elec/diagrams/crossOverCableDiagram2.jpg&imgrefurl=http://www.archonmagnus.com/computing/elec/crossoverpins.php&usg=__J27X9noP3nLy4QXoCTPOgduAQtw=&h=345&w=460&sz=79&hl=en&start=1&um=1&tbnid=9ggb4ajmuqb-qM:&tbnh=96&tbnw=128&prev=/images%3Fq%3Dcross%2Bover%2Bcables%26hl%3Den%26rls %3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7GGLR_en%26sa%3DX%26um%3D1)
Type in your routers address, user name and password, then disable wireless. If not using wireless, I would disable, can be hacked.

Color of the cable doesn't really matter since you only have a small home network .

for the wireless situation, access the router interface by typing in the ip of the router (the default gateway value of your wired PC on the address bar of internet explorer.

For linksys routers the default is 192.168.1.1 (if you didn't change it) and default password is admin (lowercase).Just leave the username blank (this is if you didn't personalize the router username and password)

Click on the wireless tab, and on that page just set the wireless ssid broadcast to disabled.
That will disable the broadcast of your wireless network so people nearby won't be detecting the signal of your wireless and will prevent hackers from connecting.. hope my tip helps..

The color of the cable doesn't matter.

To change wireless settings:
Log into your router. I assume you know how, if not: in your browser, type the router's address (Index of / (http://192.168.0.1), or 1.1, or whatever you may have set it at)
Click on the Wireless Tab. Click down in the dropdown box next to 'Wireless Network Mode' and choose 'Disabled'. Click Save at the bottom of the page, then click on Apply settings.