Also who can tell me something about indexing schemes:

What is internal, mysql, mssql, and non-indexed? What should be the correct scheme in LInks?

I tried to choose mysql indexing scheme, but got an error "database is too big to do it on the web..." So I did an internal indexing scheme and rebuilt my index. I did another search and hits are improved singnificantly. My problem may be fixed. Still I don't understand what is going on here. Any help will be appreciated