How can i change my theme for sidekick slide to a theme that i uploaded?

i want this hellokitty theme that i downloaded from a site, but when uploading it onto my sidekick slide, im not sure where to upload it to .. dcim? or music ? or do i create a new folder? and after uploading it, how do i set it as my theme/background?How can i change my theme for sidekick slide to a theme that i uploaded?
Copy them to the Dcim folder or create a new folder ';Others'; and then copy the theme file there, to run/install/apply the theme go to the same folder on your phone and then select option and then scroll down to the appropriate option!