Execute the queries below in your Lansweeper configuration console under Lansweeper\Database Scripts.
Purchase dateINSERT INTO tblCompCustom (Computername)
SELECT Computername
FROM tblComputers
WHERE (Computername NOT IN (SELECT Computername FROM tblCompCustom AS tblCompCustom_1))
GO
UPDATE tblCompCustom
SET PurchaseDate = '06/26/2011'
FROM tblCompCustom INNER JOIN
tblComputersystem ON tblCompCustom.Computername = tblComputersystem.Computername
WHERE (tblComputersystem.Model LIKE 'DG41WV')
Warranty date (Replace "YourWarrantyDate".)
INSERT INTO tblCompCustom (Computername)
SELECT Computername
FROM tblComputers
WHERE (Computername NOT IN (SELECT Computername FROM tblCompCustom AS tblCompCustom_1))
GO
UPDATE tblCompCustom
SET Warrantydate = 'YourWarrantyDate'
FROM tblCompCustom INNER JOIN
tblComputersystem ON tblCompCustom.Computername = tblComputersystem.Computername
WHERE (tblComputersystem.Model LIKE 'DG41WV')