for anyone trying to find a good working classic xray version for 1.12.2, here is a link: http://www.mediafire.com/file/fskah5e749xa9fh/XRay-58.jar
it only includs xray, cave finder, full bright and xray GUI. no fly or coordinates. i changed the mod's version.
i dont really know how to use that mode.
explination on how to use the coordinates mod: https://minecraft.curseforge.com/projects/batty-ui
to fly faster press +, to fly slower press -, to enable flight press DELETE
all of these mods require forge: https://files.minecraftforge.net/
to install forge, open the java file and install client. to install the mods, put them inside the "mods" folder. you can copy and paste this to your windows file brower bar, bar change the part where it says "your user name" to your windows username: C:\Users\שי\AppData\Roaming\.minecraft\mods
if you cant find the folder, enable hidden files. here is how you do it: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files
then try again.
if you dont know how to use the contrloes of the fly mode, just go to the controls center and decide what controles ou want it to be.
hope this helped you!
im presuming this is the same as before, i'll have to see if the secretrooms mod dev is willing to add anything their side so this works, although it isnt really a problem their end