As per my understanding, you can achieve this stuff by Autoloading those File, while the AutoCAD is started, there is plenty amount of solution available on internet you may check this link1 Link2
Or you can refer below step(Before following this step read above link)
1.Write a function to load the required file as you mention in Question
(defun Load_File()
;To load CUIX file "<..MyPath.../MYMENU.CUIX>" replace this with you CUIX file path
(command "_MENULOAD" "<..MyPath.../MYMENU.CUIX>" "")
;To load VLX file "<..MyPath.../MY.VLX>" replace this with you VLX file e path
(command "_appload" "<..MyPath.../MY.VLX>")
;Loading a MNU file overwites the corresponding .MNR, .MNS and .MNC files. Keep in mind that if you make any custom toolbars ;and/or buttons using the graphical on-screen method - they will be wiped when you load the MNU
;(I am not sure about MNL/MNR file loading you may try this )
;To load MNLfile "<..MyPath.../MY.MNL>" replace this with you MNL file e path
(command "_appload" "<..MyPath.../MY.MNL>")
;To load Fas file
(load "<your .Fas file path/my.fas>"
)
(load_File)
2.save this file with name as Load_file.Lsp on trusted path (ie "c:/trusted path/...../Load_File.lsp")
(if lisp file is save in trusted path of AutoCAD so AutoCAD not show pop-up while lisp file is load )
3.make new lisp file so it can Autoload as AutoCAD is started with name "acad.lsp" put below code inside file (this code say that load our first "Load_File.lsp" file)
(load "c:/trusted path/...../Load_File.lsp")
this lisp file must be save in install directory of autocad (Ex. "C:\Program Files\Autodesk\AutoCAD 2018") this step is for automatically load "acad.lsp"
As soon as acad.lsp is loaded all your files are load in Autocad.