how to include password in registration field?

Hi, first of all thank you so much for making this great plugin.
It really helps people like me who doesn’t really know much about wordpress and coding…
What I want to know is how to include password and confirm password section
in registration form along with username…
I tried it by adding new field, but it caused problem;
I turned on moderate registration function for admin approval of registration,
and…even though I activate the user, user cannot log in.
I think the password and confirm password field that I added to
doesn’t really work and making this problem..
Is there any other way to work this out?