[Hairy Scot]

I am new to eBooks and Calibre so please forgive me if this seems like a stupid question.
I have a large collection of books which I imported from various friends into my Calibre Library.
A lot of the metadata and covers were wrong so I used the "Download Metadata and Covers" option to sort this out, and in the majority of cases this fixed the problem, but I was left with a number of entries that were still wrong.
The only way I can find to remedy this is to go through my library list checking the covers and then updating the metadata and cover for those that are wrong.
Anyone know of a faster approach?
It would be helpful if Calibre had a cover display like the one in Calibre Companion.
Is there perhaps a plugin or other facility that could provide such a display?