oracle 10g client installation process step by step

Hello all,

1)I have oracle 10g client installed in my system and the required drivers from the oracle site in xi .

2)Also I tried coping the client sw from other system in which the oracle client was working fine.when I run connect.cmd i am getting an error"ora12154:tns:could not connect identifier specified.

Kindly let me know the step by step process of the same in brief.

please send the same to srinivas5780@gmail.com.

thanks,

Srinivas