To record Siebel requests, see Record a test scenario.
It is important to remember that Siebel requests and responses use a specific formalism. One of the simplest examples of the syntax used is the delimiting of each value by the integer representing the number of characters it contains. Thus, the list of values "software, NeoLoad, Siebel" is encoded as "8*software7*NeoLoad6*Siebel". Other, more complex data formatting would normally make configuring a scenario impossible without some kind of decoding tool.
Recording a Siebel scenario is straightforward however and requires no configuring.