Starting to use CRM free edition to test it

Starting to use CRM free edition to test it

Good day...We are google apps user:  www.comarbel.com.co

We started using Zoho projects since one month.....And we would like to start using the free  trial for 3 user of Zoho CRM 

The emails we want to useare:

Each one of us can acces Zoho CRM using the gmaiul account..however we are separated ..when we tried to ADD an user we can not beacuse that email address is already taken (upss  by us)

How can we set up using the same Zoho CRM database  (nothing yet) and test your solution ???

Thank you

Rodrigo Arbelaez
rodrigo@ comarbel.com.co