My.Ini - InnoDB entries

[ChrisBattersby]

I have been using MySQL in a Windows environment for about 6 months and have successfully written a couple of applications. Reading all and anything about MySQL I have been looking into the My.Ini entries, particularly those affecting InnoDB tables. Reading the site

http://www.databasejournal.com/features/mysql/article.php/3095771

it states that for InnoDB tables the most important configuration variable is innodb_data_file_path. When I look at the My.Ini file on my system this parameter is missing - the entries in my My.Ini are listed below

[client]
port=3309
[mysql]
default-character-set=latin1
[mysqld]
port=3309
basedir="D:/Program Files/MySQL/MySQL Server 5.0/"
datadir="D:/Program Files/MySQL/MySQL Server 5.0/Data/"
default-character-set=latin1
default-storage-engine=INNODB
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
max_connections=100
query_cache_size=15M
table_cache=256
tmp_table_size=18M
thread_cache_size=8

#*** MyISAM Specific options

myisam_max_sort_file_size=100G
myisam_max_extra_sort_file_size=100G
myisam_sort_buffer_size=35M
key_buffer_size=23M
read_buffer_size=64K
read_rnd_buffer_size=256K
sort_buffer_size=256K

#*** INNODB Specific options ***

innodb_additional_mem_pool_size=2M
innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=1M
innodb_buffer_pool_size=42M
innodb_log_file_size=61M
innodb_thread_concurrency=10

Am I missing something here? Any help appreciated.