You may use the files, provided:

1.) It does not involve collective use
2.) it does not suggests an association or endorsement by pixsector
3.) it is not used or included in a database or archive in such a way that it prevents or limits future visits or downloads
4.) it does not resell, assign, transfer or sublicense the files
5.) it does not use the files in printed or electronic items aimed to be resold
6.) it does not use the files in any trademark, logo or part of the same, of which may be used by any other mean to guarantee or to imply a guaranty of any product and/or service;
7.) it does not use the files in connection with porn or immoral contents.