If you will be using these modules to create your own renamed module, one of the finishing touches you should put on it before you install it, is to modify the install.sql file and create categories that are appropriate for your new module. Below is an example from the 'Bastards' module.
INSERT INTO `sys_categories` (`Category`, `ID`, `Type`, `Owner`, `Status`) VALUES
('Bastards', '0', 'bx_photos', '0', 'active'),
('Ugly Bastards', '0', 'bx_bastards', '0', 'active'),
('Dumb Bastards', '0', 'bx_bastards', '0', 'active'),
('Lucky Bastards', '0', 'bx_bastards', '0', 'active'),
('Sorry Bastards', '0', 'bx_bastards', '0', 'active'),
('Cheap Bastards', '0', 'bx_bastards', '0', 'active'),
('Sexy Bastards', '0', 'bx_bastards', '0', 'active'),
('Hairy Bastards', '0', 'bx_bastards', '0', 'active'),
('Rich Bastards', '0', 'bx_bastards', '0', 'active'),
('Fat Bastards', '0', 'bx_bastards', '0', 'active'),
('Cheating Bastards', '0', 'bx_bastards', '0', 'active'),
('Lying Bastards', '0', 'bx_bastards', '0', 'active'),
('Greedy Bastards', '0', 'bx_bastards', '0', 'active'),
('Rotten Bastards', '0', 'bx_bastards', '0', 'active'),
('Sneaky Bastards', '0', 'bx_bastards', '0', 'active'),
('Old Bastards', '0', 'bx_bastards', '0', 'active'),
('Backstabbing Bastards', '0', 'bx_bastards', '0', 'active'),
('Sick Bastards', '0', 'bx_bastards', '0', 'active'),
('Poor Bastards', '0', 'bx_bastards', '0', 'active'),
('Dirty Bastards', '0', 'bx_bastards', '0', 'active'),
('Dirty Rotten Bastards', '0', 'bx_bastards', '0', 'active'),
('Dirty Old Bastards', '0', 'bx_bastards', '0', 'active'),
('Plain Bastards', '0', 'bx_bastards', '0', 'active');
Just replace the category names, which may have been renamed by the process I outline in the module's readme.txt file. Mind your syntax!
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