Install oracle client on Solaris
To install oracle client on Solaris 5.8, Please follow this steps: 
1.      Create a user account on Solaris, just like: oracle9i.
2.      Log on Solaris with the account.
3.      Download the oracle 9i (64 bit) files from oracle website.
4.      Upload them to Solaris server.
5.      Uncompress oracle 9i files:
    1).Uncompress the file using "gunzip". 
Eg.: "gunzip solaris64_9.2.0.1.0.Disk1.cpio.gz"
2).Extract the file resulting from the step above using "cpio". 
Eg.: "cpio -idmv < solaris64_9.2.0.1.0.Disk1.cpio"
3).Repeat this for solaris64_9.2.0.1.0.Disk2.cpio.gz 
and solaris64_9.2.0.1.0.Disk3.cpio.gz
6.      To start installer from disk1 etup.
7.      Select the oracle client for installation type.
8.      Following the installation wizard, you can finish the installation easily.