Yes, install.php is inside /wp-admin/ folder; which is in the root/public_html folder for this website.
[root@hv wp-admin]# ls
about.php customize.php index.php media-upload.php nav-menus.php plugins.php upgrade-functions.php
admin-ajax.php edit-comments.php install-helper.php menu-header.php network post-new.php upgrade.php
admin-footer.php edit-form-advanced.php install.php menu.php network.php post.php upload.php
admin-functions.php edit-form-comment.php js moderation.php options-discussion.php press-this.php user
admin-header.php edit-link-form.php link-add.php ms-admin.php options-general.php profile.php user-edit.php
admin.php edit.php link-manager.php ms-delete-site.php options-head.php revision.php user-new.php
admin-post.php edit-tag-form.php link-parse-opml.php ms-edit.php options-media.php setup-config.php users.php
async-upload.php edit-tags.php link.php ms-options.php options-permalink.php theme-editor.php widgets.php
comment.php export.php load-scripts.php ms-sites.php options.php theme-install.php
credits.php freedoms.php load-styles.php ms-themes.php options-reading.php themes.php
css images maint ms-upgrade-network.php options-writing.php tools.php
custom-background.php import.php media-new.php ms-users.php plugin-editor.php update-core.php
custom-header.php includes media.php my-sites.php plugin-install.php update.php
[root@hv wp-admin]# pwd
/home/website/public_html/wp-admin
[root@hv wp-admin]#
The index.php dile is also there:
[root@hv public_html]# ls
awstats-icon index.php stats wp-blog-header.php wp-config-sample.php wp-includes wp-login.php wp-signup.php
awstatsicons license.txt wp-activate.php wp-comments-post.php wp-content wp-links-opml.php wp-mail.php wp-trackback.php
icon readme.html wp-admin wp-config.php.php wp-cron.php wp-load.php wp-settings.php xmlrpc.php
[root@hv public_html]# pwd
/home/website/public_html
[root@hv public_html]#
Any other suggestions?