Sonicwall routing between VPNs

We have an HQ and 4 remote sites.  Each has a sonicwall.  HQ has 4 VPN's setup pointing to each remote site and they are working great.  Each remote site's sonicwall has a single VPN pointing to HQ.

But now they want to send traffic from remote <---> remote for a new phone system  (currently remote sites can only talk -traffic-wise-  to HQ, they cannot talk to each other)

Do i just need to setup Route policies?  
Or change the current VPN's, but keep the same number of VPN's?  
Or do i have to now add 3 more VPN's to each remote office sonicwall?

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AntzsInfrastructure ServicesCommented:
All three of your suggestions are workable(depending on what you want to achieve)  But I would go with the first suggestion, setting up route policies.

This will be easier to manage in the long run as you wont have to manage so many VPNs.

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shard26Author Commented:
So the Route Policies would only need to be setup on the 4 remote office sonicwalls?   I would not need to alter anything on HQ Sonicwall?

Does this look right:

DESTINATION: full local IP range of other remote office
GATEWAY: local IP gateway

i assume something there is not right, cause it didn't work
shard26Author Commented:
i mean , i did the above on 2 of the remote offices , but they still cannot ping each other's default gateway
Here's an article to help. But of course, some of this depends on the models of Sonicwalls you have:
shard26Author Commented:
i ended up following this article

and it is working now.
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