I suggest you proceed as follows:
Make a copy of the file CSE-modified.bst and name the copy, say, CSE-nosort.bst.
Open the file CSE-nosort.bst in a text editor. The program you use to edit your tex files will do fine.
Toward the very end of the file, locate the two lines that just contain one word: SORT. (In my copy of the file, these lines are numbered 1465 and 1531.)
Comment out these two lines.
Save the file CSE-nosort.bst in the directory that contains your main tex file(s). Alternatively, save the file in a directory that's searched by BibTeX and update the filename database of your TeX distribution suitably. (If you don't know what the preceding sentence means, you should probably choose the first option...)
In your main tex file, change the instruction
\bibliographystyle{CSE-modified}
to
\bibliographystyle{CSE-nosort}
and perform a full (re)compilation cycle: LaTeX, BibTeX, and LaTeX twice more.
A full MWE and its output:

\documentclass{article} % or some other suitable document class
%% Create a sample bib file, with 8 dummy entries, "on the fly":
\begin{filecontents}[overwrite]{mybib.bib}
@misc{a,author="A",title="xx",year=3001}
@misc{c,author="C",title="zz",year=3003}
@misc{e,author="E",title="vv",year=3005}
@misc{f,author="F",title="uu",year=3006}
@misc{g,author="G",title="tt",year=3007}
@misc{h,author="H",title="ss",year=3008}
@misc{d,author="D",title="ww",year=3004}
@misc{b,author="B",title="yy",year=3002}
\end{filecontents}
\usepackage[super,sort&compress,square,comma]{natbib}
\bibliographystyle{CSE-nosort}
\begin{document}
\noindent
\dots as shown in previous studies.\cite{g,e,d,c,a} % cite 5 of the 8 entries
\nocite{*} % make sure all 8 entries in the bib file are processed
\bibliography{mybib}
\end{document}