SQL 2008 - Script Logins/Permissions?

Hi,

I am restoring a development SQL 2008 database over our production one but I want to keep the logins/permissions the same as they are now.  So first I'm going to restore the database over our production copy, but after that I want to run a script that will generate the users and their permissions so everyone who add access before will have the same access after the database is restored.

Any help appreciated

-Westside2008