Bit of advice required.

I've got a nook simple touch on the way and I'll be rooting it to put the android kindle app on. A while back I was given a file with some ebooks in kindle format (mobi). My intention is to put these on an SDHC card (also on order) and view them through the kindle app. Is this feasible? Further to this, all of the files are in zipped folders. Will I need to extract all of the contents into individual folders for the kindle app to be able to view them? Inside each authors archive there are folders for each title with (title).mobi metadata.opf and cover.jpeg files.

I expect there's probably an independent app that also allows mobi files to be read?

Thanks for any advice.