Windows 7 connecting to Windows 2000

I have a windows 2000 server that has had a few windows 7 clients connecting fine for the last year or so. But recently we added a few more windows 7 clients and we started having problem mapping a drive. I found the following solution to this increasing problem. On the windows 7 computers, make 3 registry changes:
(http://ubuntuforums.org/showthread.php?t=1257866)

[HKLM\SYSTEM\CurrentControlSet\Control\Lsa]
"LMCompatibilityLevel"=dword:00000001
(http://technet.microsoft.com/en-us/library/cc960646.aspx)

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\LanmanWorkstation\Parameters]
"DomainCompatibilityMode"=dword:00000001
"DNSNameResolutionRequired"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Netlogon\Parameters]
"RequireSignOrSeal"=dword:00000000
"RequireStrongKey"=dword:00000000