how can i open application created and shared by others?

hi all,

i am very new in orbeon forms. i was just assigned today by my boss. he gave me a program (1 page form) that was created by other programmer. he wants me to add some fields on the form. i've successfully installed orbeon and was able to open the summary of applications. i want to start editing the form that was given to me. how to start? it is not in the summary of applications. how to include the program that was given to me to this list so that I can edit it?

thanks.