Using Crystal Reports for Informix Database

Hi, any help on using Crystal Reports on Informix Database. I am using Informix Online database (Version 5.05) on HP-UX (9.04) and all our desktops are all Windows (either 3.1 or 95). At present, we access the database by logging into the unix server first through a terminal emulation software, so we don't have a direct client/server setup between the desktop & the database server yet. So what do I need? How can Crystal Reports access the Informix Database? What is the difference between ODBC & Native access? Besides Crystal Reports, what software do I need to run on the users desktops and the database server side? As I am not experienced in SQL server, though I phoned both Informix & Seagate software, I am still not thoroughly understand what I should have. They gave me a bunch of new names, I-NET, I-Connect, I-CLI, I-Client SDK, I-STAR,... Any suggestion will be valuable to me. Thanks a bunch. Melvyn.