Help on DataModules and MDI forms

Hi,
  I like DataModules's centralize control/code/rule idea. But I when use it
will MDI application I ended up getting 1 record only. (For example : Two
same edit form points to the same record).
 How can I get around with this problem ? Could someone give me any advice?

Thanks in advance
-Tommy <8-)
P.S.  I'm open for advice which could help me out.