Cool! Thanks!
I also found that it can be done with a VBS file....
dim oShell
set oShell = Wscript.CreateObject("Wscript.Shell")
oShell.RegWrite "HKLM\\SYSTEM\\CurrentControlSet\\Services\\RasMan \\PPP\\EAP\\13\\MaxTLSMessageLength", 64000, "REG_DWORD"
Set oShell = Nothing