which file to install on wrt54g v.3.0

[jenom]

there is two different file which seems like would work for wrt54g v3.0 :

1)---brcm47xx (because wrt54g has a brcm4712 chip)
2)---wrt54g (because it is the model number)

Which one should I use ?
What is the difference between those two ?

Thanks

[jenom]

since I got no reply, decided to do a trial & error approach
used openwrt wer gui (luci) >>>software >>>upgrade firmware page
1)selected --wrt54g file >>>received reply: not compatible format
2)selected ---bcm947xx file >>>>>upgrade went through
Now I have a nice gargoyle web interface !