From the Browser on your phone (not Opera), go to the link that I sent you above. When the page loads click the link for the theme you want to install on your phone.
Then go to Options > Themes > [Select Your New Theme]
I went to the site and clicked on the one I like. It opened a page and it seems to have programming text. what do I do? are there other sires that have these type of screens?
You can input the link into your BB browser or send yourself an e-mail with the links to the themes you want. From your BB, select the link and it should give you an option to install the theme. Then go to options - themes and you can select the one you want.