We can't really add software to Softaculous. It's a 3rd party application and isn't easy to simply add software to. As for your error, here's a post I wrote up earlier about the same problem with Elgg (It should pertain to Oxwall as well):
That is a .htaccess file issue. Elgg includes a .htaccess file with pre-determined settings. You need to remove the comment from the "RewriteBase / " entry if Elgg is installed right in your public_html folder for the 404 errors to disappear. You can edit the .htaccess file from inside of cPanel using the Code Editor (Make sure you have enabled the viewing of hidden files in the File Manager prompt!) or by downloading the file, opening it in a text editor, saving it and re-uploading it to the server.
I installed both the latest Stable and the Beta of Elgg onto Starka just now to be sure this worked. Both completed without issues once I performed the .htaccess change. The beta informs you of this issue before the problem occurs, which is why it isn't clear to you at the moment.
Hope this helps
To help you out further, here is what you're looking for in your .htaccess file starting at Line 83:
Code:
<IfModule mod_rewrite.c>
RewriteEngine on
# If Elgg is in a subdirectory on your site, you might need to add a RewriteBase line
# containing the path from your site root to elgg's root. e.g. If your site is
# http://example.com/ and Elgg is in http://example.com/sites/elgg/, you might need
#
#RewriteBase /sites/elgg/
#
# here, only without the # in front.
#
# If you're not running Elgg in a subdirectory on your site, but still getting lots
# of 404 errors beyond the front page, you could instead try:
#
#RewriteBase /
Remove the # in front of ReWriteBase. If Elgg is installed inside of a folder, such as it would be located in /home/yourcPanelUsername/public_html/elgg , you remove the comment and change the RewriteBase to "RewriteBase /elgg/ " . Hope I'm clear.
Here's proof of a working Elgg install on Starka. My actual website is hosted on another x10Hosting server not on the Free Hosting network, but I do have a test account on Starka running a super old adfree_doubleall_doubleall package which I use for such issues (meaning I get the extra databases and other perks from a few years ago, but I do not get unmetered disk or bandwidth like everyone else does, though I can change to the new unmetered package if I wish to give this up forever). It is configured to be a Private site, hence why it seems so empty.
Elgg Stable:
http://seansite.x10hosting.com/elgg/
Elgg Beta:
http://seansite.x10hosting.com/elggtest/
