Hi Sujata,
I appreciate your interest. I'm preparing a document to help people install that. Let me explain you in brief.
First you need to install the following software in same order:
1. PHP (Ver. 4) - Version 5 is not supported.
2. Apache Webserver (latest version)
3. MySQL (latest version)
Then you install the OrangeHRM software. However, you may need to configure it to run properly. My next posting will contain an attachment with step by step instructions.
However, if you want to see how it runs,
www.orangehrm.com has online demo. You can try it there.
Regards
Ravikanth