there is a file where all the mods for tekkit are listed in .jar files
delete: netherores.jar
and then restart the server, now it should work
the IP:
its recommended to download and install
logmeinhamachi
then make ur own hamachi group and people can use the IP listed on ur hamachi window
also you can use start.command too instead of launch.command ._. just saying
hope it helps :P