It is possible, if you use the beta service available here http://torrent2exe.com/beta/index.php. If your download stops, please, click on the button "More", select the option "Remove torrent". (In this case you can save already downloaded datas. Otherwise, if you choose the option "Remove torrent and downloaded files", all downloaded information will be erased). After that, please, try to find the same torrent on the another one tracker. You will be able to download the rest of your datas without replacing of the already saved files.
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