Flags of Mexico, Brazil and the USA

[sola]

For my HTML/CSS website, I want it to be in Spanish, Portugese and American English, specifically for audiences of the countries: Mexico, Brazil and the USA.

How can I show the flags for Mexico, Brazil and the US (instead of flags of Spain, Portgual or Britain) ??

Please advise.

Thanks a lot for your help.

[Edvard]

If you use Joomla version, there is an option for that.

Otherwise you can edit the language flags file. The PSD file can be found at:
http://code.google.com/p/joomla-gtransl ... 253Dclosed