At Sven Co-Op Central we recently decided to make some firm rules regarding submissions and they are: All Downloads must be Archived into a 7Zip Archive File. All Downloads must extract straight to the Half Life Folder (e.g everything is in a svencoop folder). All Downloads must include a txt/motd file with some information about the file and any 3rd party content that has been included. Please include a screenshot, if you have more and would like them included please pm Captain Scarlet. Please include a valid email address, we recommend including your website (If you have one) and if you have posted an announcement on the Official Sven Co-Op Forums please include a link to it!
If you can not be bothered to use 7Zip you can use a service such as SENDUIT and send Captain Scarlet an email at Chris696 [at] GMail [dot] Com and he will download, convert and place the map on the site for you. Thanks to amnizu for the recommendation.