Gettext - finding translations for imported common module

I am using PHP 5.2.4 and gettext. I have a common module that I import (require) into other modules. But when I do this pages (at a different level in site tree) do not show the translations for this module. /siteroot /siteroot/lib/common.php

/siteroot/lib/locale/[LANG]/LC_MESSAGES/message.po    #COMMON MODULE TRANSLATIONS ARE IN HERE

/siteroot/index.php             #require("lib/common.php")     #NO COMMON MODULE TRANSLATION OCCURS

/siteroot/locale/[LANG]/LC_MESSAGES/message.po /siteroot/page2/index.php #require("../lib/common.php") #NO COMMON MODULE TRANSLATION OCCURS /siteroot/page2/locale/[LANG]/LC_MESSAGES/message.po Right now all the regular translations work fine but the imported module is not translated even though I have the translations for it under the /siteroot/lib directory. If I put the common module translation into each po file under each /siteroot/pageN directory then the common module translations work but this requires tons of duplication. Is there a way to bind an alternate root or domain so that gettext can find both the local translations and the library translations for the imported common modules?