WHMCS URL-friendly Custom created page with htaccess

I need to load WHMCS [custom page][1] without .php extension but it returns 404.
URL friendly rules are set on htaccess as [default][2].
but they only apply for basic pages.
the last solution would be to set custom rules on htaccess for specific URLs to load without the .php extension.




[1]:

[To see links please register here]

[2]:

[To see links please register here]

ended up setting custom rules on htaccess for each custom page to also load without the .php extension.

<IfModule mod_rewrite.c>
RewriteEngine on

RewriteBase /

#rempove .php for custom pages on by one
RewriteRule ^customPageOne$ customPageOne.php [L]
RewriteRule ^customPageTwo$ customPageTwo.php [L]
RewriteRule ^customPageThree$ customPageThree.php [L]

# Redirect directories to an address with slash
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^(.+[^/])$ $1/ [R]

# Send all remaining (routable paths) through index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Determine and use the actual base
RewriteCond $0#%{REQUEST_URI} ([^#]*)#(.*)\1$
RewriteRule ^.*$ %2index.php [QSA,L]

</IfModule>