"Chassis Type" is under vHWComputerChassisType.[Chassis Type]. I added that to your query:
SELECT
vComputer.Name AS 'Computer Name',
vComputer.[IP Address],
vComputer.[OS Name],
vComputer.[OS Revision],
vHWComputerSystem.Manufacturer,
vHWComputerSystem.Model,
vHWChassisType.[Chassis Type],
vHWComputerSystem.[Identifying Number] AS 'Serial Number',
vHWProcessor.Model AS 'Processor',
vHWComputerSystem.[Total Physical Memory (Bytes)] / 1048576 AS 'RAM (MB)',
I.Name AS 'Location',
vComputer.[User] AS 'Primary Owner'
FROM vComputer LEFT OUTER
JOIN ResourceAssociation AS loc ON (loc.ChildResourceGuid = vComputer.Guid OR
loc.ParentResourceGuid = vComputer.Guid) AND loc.ResourceAssociationTypeGuid = '05DE450F-39EA-4AAE-8C5F-77817889C27C' LEFT OUTER
JOIN vItem AS I ON loc.ChildResourceGuid = I.Guid LEFT OUTER
JOIN vHWProcessor ON vComputer.Guid = vHWProcessor._ResourceGuid LEFT OUTER
JOIN vHWChassisType ON vComputer.Guid = vHWChassisType._ResourceGuid LEFT OUTER
JOIN vHWComputerSystem ON vComputer.Guid = vHWComputerSystem._ResourceGuid
WHERE
(vComputer.IsManaged = 1)
AND (vHWComputerSystem.Model LIKE '%nc6220%'
OR vHWComputerSystem.Model LIKE '%nc6320%'
OR vHWComputerSystem.Model LIKE '%6510b%'
OR vHWComputerSystem.Model LIKE '%6530b%'
OR vHWComputerSystem.Model LIKE '%6455b%'
OR vHWComputerSystem.Model LIKE '%nc6000%'
OR vHWComputerSystem.Model LIKE '%6465b%'
OR vHWComputerSystem.Model LIKE '%2510p%'
OR vHWComputerSystem.Model LIKE '%2530p%'
OR vHWComputerSystem.Model LIKE '%2540p%'
OR vHWComputerSystem.Model LIKE '%2560p%'
OR vHWComputerSystem.Model LIKE '%2570p%'
OR vHWComputerSystem.Model LIKE '%6475b%'
OR vHWComputerSystem.Model LIKE '%9470m%')
and vComputer.Name NOT IN (select vComputer.Name FROM vComputer
join Inv_AddRemoveProgram arp on vComputer.Guid=arp._ResourceGuid
where arp.DisplayName like '%PGP Desktop%')
ORDER BY 'Computer Name'