All SQL Servers 2000 of Intermedia have full text search feature enabled, so you should be able to use this functionality on your site. Apart from the fact that it is enabled on the whole server, each database you want to search in should be modified as well. For that you need to use sp_fulltext_database procedure. And then use other sp_fulltext_... stored procedures to manipulate indexes.
Note: sp_fulltext_database has no effect on full-text catalogs in SQL Server 2005/2008 and later versions and is supported for backward compatibility only. sp_fulltext_database does not disable the Full-Text Engine for a given database. All user-created databases in SQL Server 2005/2008 are always enabled for full-text indexing.