[horde] Can't install Horde Groupware Webmail 5

[Reppy Gibbs]

Hello there.
I'm trying to install Horde Groupware Webmail 5 in a remote server, I've
did all the steps described here:
http://www.horde.org/apps/webmail/docs/INSTALL and it seems everything went
well until this step:
http://www.horde.org/apps/webmail/docs/INSTALL#finishing-installation,
which returns an error:

command: PHP_PEAR_SYSCONF_DIR=~/www/webmail php -d
include_path=~/www/webmail/pear/php ~/www/webmail/pear/webmail-install

Warning: require_once(~/www/webmail/lib/Application.php): failed to open
stream: No such file or directory in
/home/MYUSER/public_html/webmail/pear/webmail-install on line 17

Fatal error: require_once(): Failed opening required
'~/www/webmail/lib/Application.php'
(include_path='/home/MYUSER/www/webmail/pear/php') in
/home/MYUSER/public_html/webmail/pear/webmail-install on line 17

I've checked that directory and it doesn't exists (~/www/webmail/lib).

Also, it seems the version is the 4.0.9 (because the downloaded package is
webmail-4.0.9.tgz), not the newest 5 version, although I just did the steps
on the link, which are supposed to install the version 5.

I don't have any experience with this Pear stuff, so sorry if this is a
stupid question.

And finally, is there a way to install Horde like the other PHP softwares,
by just extracting the files and maybe editing a configuration.php file? Or
maybe there's a way to install Horde Webmail locally and then transfer it
to my remote server?

Thank you in advance.

Best Asgards.