To Download Linksys WRT54G firmware you should find model number or Version number of your Linksys Wireless Router like WRT54G ver ....
Step 1: Flip your wireless router over. Step 2: You should find the model number on a sticker . Please see the example. The serial number is located right underneath the model number. In this example,the model number of the device is WRT54G ver 6.
Linksys WRT54G firmware