Portable information processor and installation method

A portable information processor, comprising:

• a display unit operable to display a menu image indicating a menu of registered programs, said menu image having a plurality of sections;
• a display control unit operable to control said display unit to superimpose icons on said sections of said menu image as start buttons for starting said registered programs;
• a category information obtaining unit operable to obtain category information indicating a category of a newly-installed program;
• a category judging unit operable to compare said newly-installed program with said registered programs, and to judge whether or not said newly-installed program overlaps in category with one or more of said registered programs, wherein
• when one of said registered programs is judged as overlapping in category with said newly-installed program by said category judging unit, said display control unit deletes an icon of a registered program overlapping in category with said newly-installed program, and superimposes said icon of said newly-installed program on a section of said deleted icon.