Tried it, ..

cpanel 4.9 lets you save as 400.shtml etc.
So I just put in a meta refresh tag for 0s to redirect to the error.php and it works now very nice :)

How do i do this :)?

I'm wondering the same thing.

Run an SQL query :)

phpMyAdmin = your best friend.

Could you elaborate on this? I have phpMyAdmin installed and I've used it many times... How do I import the file?

I'd say .. read the manual.

But.. you could copy paste the content of the .sql file to the big input window and press go. it will run the query then.

Just a note, in the instructions it says

If you just add the path, and leave out your domain the error document will take the place of the URL.. soo.. by going to dasdsa.php it leaves the url as dasdsa.php and gives the error reason. Otherwise it redirects you to the error.php ^^

:o Nope! :D

Well, actually, when I first tested it, I wasn't getting the number to show up in the browser title bar. So I figured maybe for the variable to get parsed into the template it had to be explicitly declared, which is why I did that. But I think I just needed to refresh or something...anyway, it started working, I don't know why, but it did, and I forgot to take that part out. :)

LouChipher: I can't release a German version myself, since I don't speak it well enough to translate it. But it should be easy, since all the language is in the templates. If anyone else wants to do it, by all means, feel free.

Ian: If you can use phpMyAdmin, it's easy. You can do what xiphoid said, which is to open the file newtemplates.sql, copy the entire contents, go to phpMyAdmin, on the screen where you see the list of tables in the left pane and below that you have a text box labelled "Run SQL query/queries...", paste the contents of the file into that box, and hit the Go button. Or, an easier way is to go to that same spot in phpMyAdmin, but below that text box is a smaller field with a Browse...button, which you can use to point it to the file newtemplates.sql, then hit the Go button. That will upload the file into the server's memory and execute the instructions inside it.

Takara: I'm not quite sure I understand what you're saying. Are you saying in the .htaccess file, on the ErrorDocument xxx lines, I can make the path to error.php be relative, not full? Just make it like ErrorDocument 400 forums/error.php?error=400?

Very nice hack, looks great. I also use the cpanel for custom error documents, so I'll have to look into xiphoid tip on integrating it ;)

I believe the various cpanels that let you add custom error documents only help to automate the process. That does not (or shouldn't) exclude the ability to do it manually. If you create a custom 404 page, for example, it just saves that page for you somewhere and adds the appropriate line to .htaccess. If you can edit .htaccess manually, you can do this hack. :)