[j-nsp] SNMP towards NetScreen - need help about which OIDs to ask for...

[F J]

Hi,
We are implementing a monitor solution based on Nagios. 
 
I have managed to find the OIDs for:
- Free Memory
- Temperature 
- Fan status
- Sessions
- Uptime 
- SW version
 
But I can't find which OIDs to query to get info about:
- Number of active VPN tunnels
- Number of policies
- HW model of the unit
 
Info about the NetScreen firewall I am testing with.
Hardware:  SSG-320M 
Hardware Version:  REV 16(0)
Firmware Version: 6.3.0r11.0 (Firewall+VPN)
 
Cheers,