The problem is that you specify \documentclass as a #+LATEX_HEADER in your setup file. Instead, you should specify it in two pieces, using #+LATEX_CLASS and #+LATEX_CLASS_OPTIONS[1]:

#+OPTIONS: toc:nil 
#+STARTUP: align fold nodlcheck hidestars oddeven lognotestate 
#+LATEX_CLASS: article
#+LATEX_CLASS_OPTIONS: [11pt]
#+LATEX_HEADER: \input{../header.tex}
#+KEYWORDS: orgmode pdf latex
#+LANGUAGE: en

After that, you don't have to worry about zeroing out the default preamble. It will consist of \usepackage declarations that will load the packages into TeX's memory, but if you don't use them, they'll just sit there, bothering noone.

If you really want to zero it out, overriding the article class in org-latex-classes is indeed the way to go, but I suggest you don't go there unless you really have to.

Finally, in order to impose a new title structure, you can either redefine \maketitle in your own header.tex and leave it at that. But since you seem to want your own command \psetheader, then you can redefine the variable org-latex-title-command whose default value is "\\maketitle" (remember that backslashes have to be escaped with another backslash in an elisp string). Use customize preferably (or set it in your init file: (setq org-latex-title-command "\psetheader")). Assuming\psetheaderworks like\maketitle, it does *NOT* go in the preamble: it has to be inserted right after the \begin{document}. Redefining the org-latex-title-command` is the way to accomplish that.

[1] See also LaTeX header and sectioning structure for a specific example.

The problem is that you specify \documentclass as a #+LATEX_HEADER in your setup file. Instead, you should specify it in two pieces, using #+LATEX_CLASS and #+LATEX_CLASS_OPTIONS[1]:

#+OPTIONS: toc:nil 
#+STARTUP: align fold nodlcheck hidestars oddeven lognotestate 
#+LATEX_CLASS: article
#+LATEX_CLASS_OPTIONS: [11pt]
#+LATEX_HEADER: \input{../header.tex}
#+KEYWORDS: orgmode pdf latex
#+LANGUAGE: en

After that, you don't have to worry about zeroing out the default preamble. It will consist of \usepackage declarations that will load the packages into TeX's memory, but if you don't use them, they'll just sit there, bothering noone.

If you really want to zero it out, overriding the article class in org-latex-classes is indeed the way to go, but I suggest you don't go there unless you really have to.

Finally, in order to impose a new title structure, you can either redefine \maketitle in your own header.tex and leave it at that. But since you seem to want your own command \psetheader, then you can redefine the variable org-latex-title-command whose default value is "\\maketitle" (remember that backslashes have to be escaped with another backslash in an elisp string). Use customize preferably (or set it in your init file: (setq org-latex-title-command "\\psetheader") ). Assuming \psetheader works like \maketitle, it does NOT go in the preamble, so you don't add it as a #+LATEX_HEADER in your setup file: it has to be inserted right after the \begin{document}. Redefining the org-latex-title-command is the way to accomplish that.

[1] See also LaTeX header and sectioning structure for a specific example.

The problem is that you specify \documentclass as a #+LATEX_HEADER in your setup file. Instead, you should specify it in two pieces, using #+LATEX_CLASS and #+LATEX_CLASS_OPTIONS[1]:

#+OPTIONS: toc:nil 
#+STARTUP: align fold nodlcheck hidestars oddeven lognotestate 
#+LATEX_CLASS: article
#+LATEX_CLASS_OPTIONS: [11pt]
#+LATEX_HEADER: \input{../header.tex}
#+LATEX_HEADER: \psetheader
#+KEYWORDS: orgmode pdf latex
#+LANGUAGE: en

After that, you don't have to worry about zeroing out the default preamble. It will consist of \usepackage declarations that will load the packages into TeX's memory, but if you don't use them, they'll just sit there, bothering noone.

If you really want to zero it out, overriding the article class in org-latex-classes is indeed the way to go, but I suggest you don't go there unless you really have to.

[1] See also LaTeX header and sectioning structure for a specific example.

The problem is that you specify \documentclass as a #+LATEX_HEADER in your setup file. Instead, you should specify it in two pieces, using #+LATEX_CLASS and #+LATEX_CLASS_OPTIONS[1]:

#+OPTIONS: toc:nil 
#+STARTUP: align fold nodlcheck hidestars oddeven lognotestate 
#+LATEX_CLASS: article
#+LATEX_CLASS_OPTIONS: [11pt]
#+LATEX_HEADER: \input{../header.tex}
#+KEYWORDS: orgmode pdf latex
#+LANGUAGE: en

After that, you don't have to worry about zeroing out the default preamble. It will consist of \usepackage declarations that will load the packages into TeX's memory, but if you don't use them, they'll just sit there, bothering noone.

If you really want to zero it out, overriding the article class in org-latex-classes is indeed the way to go, but I suggest you don't go there unless you really have to.

Finally, in order to impose a new title structure, you can either redefine \maketitle in your own header.tex and leave it at that. But since you seem to want your own command \psetheader, then you can redefine the variable org-latex-title-command whose default value is "\\maketitle" (remember that backslashes have to be escaped with another backslash in an elisp string). Use customize preferably (or set it in your init file: (setq org-latex-title-command "\psetheader")). Assuming\psetheaderworks like\maketitle, it does *NOT* go in the preamble: it has to be inserted right after the \begin{document}. Redefining the org-latex-title-command` is the way to accomplish that.

[1] See also LaTeX header and sectioning structure for a specific example.