sir, are you refering to a guide that would help you setup a Roseonline server using hamachi program? if so then you still need to follow the guide provided. and the only thing that you should edit on the guide is the IP address. found on your roseonline server folder. and these are the .conf files (worldserver,charserver, and loginserver), make sure that you edit the IP address to your hamachi IP address ex.
[DATABASE]
mysql_host=localhost
mysql_user=root
mysql_pass=you password
mysql_database=roseon
mysql_port=3306
AutoQueryTime=600
[SERVERDATA]
serverid=1
servertype=1
serverip=5.x.x.x //your hamachi adress
serverport=29100
servername=servername
parentid=0
accesslevel=100
connection=2
lanip=10.0.0.1 //your pc IP address
lansubmask=255.0.0.0
[CHARSErVER]
deletetime=3600
usethreads=0
[PASSWORDS]
loginpass=789456
charpass=456123
worldpass=321654
and last is the lconfig file found on your client folder, make sure that you have your hamachi IP on that file