Chelovekus: то же, но в виде рег-а
Код:

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\Environment]
"TEMP"="c:\\temp"
"TMP"="c:\\temp"
[HKEY_CURRENT_USER\Environment]
"TEMP"="c:\\temp"
"TMP"="c:\\temp"