I will answer this directly, since what you got as reply may be confusing and is in fact sometimes misleading already.
I see forum tags for game patch 4.13/4.14/4.15 How do i find those patches, or are they actually necessary?
No. Don't do that under any circumstance. Stock game 4.12 is the base. No higher base game patches are supported.
It is not stated in the install instructions for BAT, is it? So doubly no.
If something is not explicitly mentioned, you do not have to install it. Period.
It may be even detrimental if you do it anyway.
2. some of the BAT updates in that list mention NEEDING to have other things installed before installing them. Is that still a need?
Yes, the updates come in a sequence which has to be kept. (4.2.2 after 4.2.1 after 4.2.... logical, right?)
But the sequence is kept simple and straight forward.
Something call UF4P?
Where did you read that? No such thing as an unknown item like "UF4P" is needed. No idea where you think you saw that. Please, be precise when quoting such stuff.
If you really mean UP4, that is something else entirely and has nothing to do with BAT. You would not have seen it anywhere near BAT or a BAT install instruction though.
3. Do i need to install every update patch for each version of BAT before loading the next one? IE download BAT 4.0 then the linked update patches, then download BAT 4.1 then the linked update patches and so on. Or can i simply sit back, download BAT 4.0, then simply download the others in numerical order?
I think you are confusing a few things. It is simply the numerical order, as said above.
This is the sequence - one after the other. Just this:
https://www.sas1946.com/main/index.php/topic,66170.0.htmlI see that there are new updates/fixes for 4.2... Am i required to install them if i have installed 4.2.2?
You mean the hotfix? (it is just 1 (one) - singular - hotfix)
Yes, absolutely. It fixes important things, as the name says. So there is no sane reason to leave it out.