No worries,the things listed in your hosts file are supposed to be there,and are safe,as long as 127.0.0.1 is listed beside them.Spybot adds the bad sites listed there so that if you were to unknowingly go to one of the sites listed there,your browser will just show you "Page cannot be displayed" or similar.There's a short explanation about it here:
http://www.safer-networking.org/faq/hosts-file/
You can probably configure Spyhunter in some way to allow you to add the additional Spybot host file entries,and keep using Spyhunter Hosts protection,if you prefer that.But I'm not familiar with it,so it might take a bit of trial and error.

If you left your immunization window as is without re-selecting everything,then you can go back into immunization,check that only the hosts file is checkmarked.Try clicking the immunization button at the top with the green cross beside it.
If Spyhunter alerts you that there are changes to your hosts file,try clicking the Ignore button,so that it will allow the changes to your hosts file.
If you don't get an alert from Spyhunter,let me know.