sorry forthe delay.
 
Yes and yes.  Vtiger is based on an old version or Sugar CRM.  Vtiger has made it very dificult and cumbersome to work with.
 
You can use any email you want!  You can also add any of the sugar addons to it!
 
The documents part is for any available documents.  You can clasify them as Sales Docs, Customer support, FAQ ...  You can then make these document groups available to others through group association!
 
Not using the Talend , jasper or jitterbit products.  they slow down the machine.  Using PSQL services, views and triggers to move data.