i need a ticket system

i want:

1) mycustomers send an email, and system automatically open ticket

2) see open tickets, and assign them to users

3) link ticket to customer (automatically best, but not needed, i can do it manually)

3b) simple customer agenda (name, email)

4) sign how much time to close a ticket (date, hour, minutes)

5) report about hours / tickets order by date (weekly, monthly) and customer, in order to make invoices

6) it's best if:

6b) send an email to customer when ticket status changes

6c) customer can see his tickets

7) link tickets to products used



i search for another software (rt, vtiger, sugarcrm, ecc.) but they don't work as i want.

i found xhelp, but it's not updated. so, i want to modify it by myself. but:

1) if you know a good software for ticket please tell me or
2) do you want to help me in updating and improve xhelp?

this is all, i hope for some response :)

byebye

We currently use xhelp which is good but it would be great if this was updated as it doesn't do everything we need either.

Alternative ticketsystem module is Zentrack.