It is not difficult to figure this out. If you open any script or view any of them on this site you'll see that commands are issued like so:
Actor[something]

oIt
Target:Face
EQ2:CreateCustomActorArray
Then, since you are EXPECTED to read the ENTIRE isxeq2 wiki before using ths software, you would be able to logically deduce that the first word in all of these instances (before the colon) is a "Top Level Object", which returns a 'datatype object'. And, each datatype has methods and members. Moreover, from your study of existing scripts and the wiki examples, you would have deduced that "methods" are accessed via colons and "members" are accessed via periods.
With that knowledge in hand, you would then read the patch notes which said:
Code:
* Added the following new METHODS to the 'isxeq2' datatype:
1. EnduringBreath[enable] ('EB' also works as an alias for 'EnduringBreath')
EnduringBreath[disable]
So, you know that "EnduringBreath" is a method of the 'isxeq2' datatype. So, all you need to do is determine how you access that datatype. So, you start going through the list of "Top Level Objects" on the wiki until you find one that returns an 'isxeq2' datatype. If you don't find one, then you start looking through the datatypes until you find a MEMBER that returns an isxeq2 datatype. However, this one is easy very easy, and you find that the 'ISXEQ2' Top Level Object returns the 'isxeq2' datatype making the command look like:
ISXEQ2:EnduringBreath[enable]
I honestly don't know how much easier to make it. You all need to understand that isxeq2 is NOT intended for casual users. All isxeq2 users are EXPECTED to read through the entire isxeq2 wiki, all postings on these boards, AND study past scripts. I promise that if you make a study of the scripts on these boards (especially the simplier ones), all of this will make complete sense without having to ask simple questions like this one.