Engine swap and transmission??

I have a 1998 mitsubishi mirage which is auto trans.... i want to change the trans to manual and i also want to get a better engine.... does anyone have any suggestions on what kind of engine will fit in my car and if i can change my trans at the same time???? also, if u can also tell me how difficult and how much it wil cost to do i would appreciate it....

Thanks
Ariez