I'm not entirely sure I understand you...
the RSK installation includes the ablity to add SNMP trap capability to EMS - this means that errors/warnings you have setup for EMS to trigger on (Unity related or not) can raise traps. This model is handy for a number of reasons, not the least of which is its very flexible and doesn't require a static list of traps (which change from version to version).
the EMS approach is to allow you to notify someone about errors or warnings on the Unity box - end of story - it doesn't provide a static list of all possible errors (and by extension all possible trap events that can be raised).
The list of all possible event log messages (which are flagged as info/warning/errors at run time - some can and do serve as both) can be obtained on the www.ciscounitysupport.com site for versions through 4.0(5) anyway - although such a list is of dubious use in my mind.
Not entirely sure what you're finding silly or what it is you're hoping to get here...
