There are two correct spellings for this word.
Catalog (english N)
Catalogue (French)
Personally, 'Catalog' would be my first pick. I believe most surfers would auto key in 'catalog' first... (wouldn't want to loose traffic to CatalogWizard...
Wizard works here..
Wizard.. to effectively 'search' the catalogue/library contents.
Not sure of the value. GoodLuck.