title: Is it safe to turn INNODB engine on when all the tables are MYISAM at the moment?
body: <p>I need to have possibility to make transactions while using one of my mySQL tables. 
  I could do that if I'd switch engine from MYISAM (which is set by default to all of the tables at the moment) to INNODB. 
  However I am not MySQL server admin and guy who is has asked me if I have read about possible dangers of doing so.
  I tried to find an answer and failed, so here's my question:</p>
  
  <p>INNODB is currently DISABLED (it says so when im execute SHOW ENGINES). Can I turn it ON without risk of damaging any data in existing MYISAM tables? Are there any specific dangers when doing so?
  MYSQL version of server is 5.09.</p>