I see from easyphp.org that, EasyPHP 1.8 version finale has 'finally' been released :)
I highly recommend upgrading to the latest version of easyphp (1.8, stable) as it appears on the surface to now provide support for PHP 4.3.10 (eZ publish requires 4.3.4 or later)
If I was in your situation I would lean towards using ez.no's eZ publish installers, instead.
http://www.ez.no/ez_publish/download
Be sure to backup your database and eZ publish directory! I would also store these backups into another location (perhaps in a compressed (tar.gz / zip) archive)!