Hi Hyder, Yes you can do this . Check Installation Guide at http://download.oracle.com/docs/cd/B40089_06/current/acrobat/120oaig.pdf First install on Database Tier and then Middle Tier On Page 55 when prompted for Application Tier change HostName accordingly. For overview of Installation and location to download R12 software visit. http://onlineappsdba.com/index.php/2007/10/06/install-oracle-applications-r12-12i-on-unixlinux/ Atul hyder hussain syed <sd.hyder@xxxxxxxxx> wrote: Hi all, We want to install Release 12 in Solaris 10 . we have two sun servers Sun fire v490 and we want to use as one for applications and other for database. Can we use this one server for all application services like web,forms,concurrent ,admin etc and other for only database. How to install in two node (procedure or steps) ? Please provide the steps/doc or suggestions on two node installation Thanks hyd