you need to read the supplied manuals to understand the integration and setup.
If you do not understand (this can be a tricky integration), then I suggest you engage with a company that has performed this integration before - there is also information surrounding the integration available in other discussions.
Please let me know if there is any Document related to integration of Remedy Gateway and remedy Application
Googling "ibm tivoli netcool omnibus gateway for remedy ars" looks like it brings back some links to documentation. Such documentation would come from IBM, not BMC.
David J. Easter
Product Line Manager, AR System
BSM & Atrium Solutions Mgmt
BMC Software, Inc.