WP Fantastico directory configuration

I would appreciate seeing instructions for newly installing WordPress 2.8.6 using Fantastico into a custom directory configuration.

Having studied the available guidance I have a pretty good idea of what’s needed, but to avoid mix-up I want to be sure of what I’m doing.

I want to leave my existing site in place for now, and put the WP blog in a subfolder (linked from existing pages), with the WordPress files in their own folder in the root directory. Thus:

/root
___/public_html
______index.htm (the existing front page)
______/(existing site folders & files)
______/blog
_________/index.php
___/my-wordpress (wp db, etc)
___/(other root folders & files)

So I plan to do the installation into root/my-wordpress (which Fantastico would auto-create), then move WP’s index.php into public_html/blog, adapting the addresses as shown here:

Giving WordPress Its Own Directory
https://codex.www.ads-software.com/Giving_WordPress_Its_Own_Directory

=== Before moving index.php:

(1) In the General panel, change the blog address to https://www.mydomain99999.net/blog/

(2) Move index.php from root/my-wordpress to /public_html/blog

(3) In index.php, change

require(‘./wp-blog-header.php’)

to

require(‘./../my-wordpress/wp-blog-header.php’)

(4) Move .htaccess from root/my-wordpress to /my-wordpress/blog

Then move index.php.

Does this sound right?

Later, if I want WordPress to be the site shell (replacing or moving the existing pages), would that be a manageable conversion, using a similar procedure to move index.php and adjust the addresses?

Thank you.