how to 'tick' files manually?

[abhiram]

hi! when i come across already downloaded files in my search,i find a tick mark against them.now can i do something such that whenever i come across a particular file(or many files) in my search,i shud find them 'ticked',even though i have not downloaded them?i mean 2 ask,just as i can mark messages as 'flagged' in my yahoo mail,can i check some files such that they appear to be ticked in my search?