Mod Rewrite Job Now Please

Need someone to give the exact text/syntax for an .htaccess file to do the following mod rewrites: Examples: [login to view URL];lang=en to [login to view URL] [login to view URL];lang=en to [login to view URL] [login to view URL];catid=2&subcatid=3&cityid=&lang=en to [login to view URL] [login to view URL];adid=51377&cityid=&lang=en to [login to view URL] (where it knows the Country / City / Category Name / Ad Title is associated with id=# from a mysql table dynamically) Must work with all our current categories and Ads and future posting automatically. Hope this all makes sense. Please bid to start ASAP, if you need to discuss something / your comments, please do it through PMB, Thank you !