i don't like any of those my-xxx.cnf's. the variables are either too small or too big. i would just recommend using this as a "base" my.cnf:
and of course in this case add `tmpdir=path' if you need it under [mysqld].
# Uncomment and change the next line if you installed
# MySQL somewhere other than the default C:/mysql
set-variable = table_cache=512
set-variable = thread_cache_size=8
set-variable = wait_timeout=3600
# Here you can put your username and password
# if you want so that you don't have to manually
# enter them when using mysql, mysqldump, etc.
# Uncomment the lines if you do!