127.0.0.1 is the localhost address for your PC. If fact all PCs that are configured for tcp/ip will have that address. Its for running internal networking stuff.
You can use either the 198.xxx.xxx.xxx IP or localhost because both address resolve to your PC.
swat is a web based configuration tool for the smb.conf file and runs on port 10000. Hence the :10000. No port address listed is actually 80 which is what webservers run at.
samba configuration file is usually located in the /etc/samba/ directory. You need to be logged in as root to modify and file in the /etc directory.
For more info and documentation on samba and swat see
www.samba.org.