Hello SamSeeSam  

To host in Open Nap you need to used 
[Slavanap] programme .. (More Details or the programme go there )   newbielink:http://www.slavanap.org/ 
[nonactive]And if you have an IP who change you will need the 
[No-IP Dynamic DNS]  programme ... (More Details or the programme go there )
  newbielink:http://www.no-ip.com/services/managed_dns/free_dynamic_dns.html 
[nonactive] gclid=CLqGpM7km44CFREDWAodAU58ZQ
People with Utatane , Winmx and few other programme can join  your Slavanap (Host ) if you allow us to join or if you didnt password it.
If you need other help PM me or re write   
