Importing users from external database into your forum
 

I wanted to ask that if i have to forum and i wanted to add all the users from my older forumm to my newer forum. Is it possible?
I mean i have a database with usertable of a vbulletin forum. Now i want to add these users in my current vbulletin forum,how can we do this without any userid change or password loss of current users.

ImpEx can do this, but all the user IDs will be renumbered.

Will only the newly added users id numbers will be changed or all will changed including those users who already exist on the forum.

Those who already exist will not be touched.

Thanks for the help.