need a wordpress plugin edited to us external database

i had a wordpress plugin made for me and right now it shares the wordpress database.
i tried going through the php and figuring out if i could change it to an external database but i cant find it.
i was hoping maybe someone here can take a look at it for me.
i want it to use database.mywebsite.com format instead of locally hosted database.
i originally asked someone to convert it to use an externally hosted text file but he never got back to me.

now i know it would be even easier for me to keep it in an external database.


im just not sure how to change all the $wpdb entries to = database.mydomain.com
and tell it what user/pass to use for that database without it being clear text.

Just to let others know, I've got it done for SleepieGirl already.