I 've installed horde (www.horde.org) (webmail imp, forum, ...):
It's really fine !!!
no problem with php & apache
I can tgz the /opt/lampp directory (lampp + horde), reinstall the tgz in an another computer : this new install is ok without recompile something or without modify horde config !!!!
PS : have you forget my request ?
--> the line to compile apache with lampp options ...