Hi All,
 
Thank you for last reply and links about galaxy structure. The links were helpful. But still I am uncertain about many files and their uses. To previous question, I will require further help on following issues:
  1. Where all users information is stored in file structure so that i can add custom users  for my galaxy server?
  2. Is it possible to customize left purple panel?
My real aim is to customize the galaxy browser instance as per my needs and use for internal development, which i think is possible?. So, if you guys have any development documents which can be shared to provide further insights about file and directory structure will be really helpful.   

Regards

Gaurav Thareja