Verification regarding Event Monitor.  Are these statements true?

(1) There can only be one “Event Monitor” running (one with a settable refresh rate)?

(2) If true, there can only be one Filter selected and therefore if you have several event filters you would like to run, they have to be combined into one?

If all the above is true, is there another way to edit this file (possibly within notepad or equivalent), these scripts may get evolved?

Thanks

-Bill