iSeries NAvigator for WEB and SYSINT instance


Can anybody help me with it?
I've configured iSeries Access for Web and it's fine.
But I have a problem with Navigator. In they
write about application server SYSINST - I don't have it, and I don't know if should I have.
I don't have any idea how to configure SYSINT. I know that than I should connect it to ADMIN http instance.
Can anybod give me any advices?