The answer to your question was spelled out right there in very clear english in the fourth line of the opening post of this topic.dude im new by some miracle i didnt brick my 3ds while downgrading and installing rxtools im surprised i got this far most of the words and acronims used here are alien to me last night was my very first time doing anything hack related to the 3ds so any help is greatly appreciated
I'm sure you understand what a boot entry and rxtools are as your entire question was if it could autoboot rxtools.
If you took the time to read it, then you didn't even try to understand, because you can clearly comprehend it.
I understand this whole process can be frustrating and tiresome, but it's no excuse for laziness.