Yes its certainly possible though whether its a good idea is another matter.
Make sure none of the individual tables, forms etc have the same name.
Create a new blank database then import all items into that.
If you have duplicated module code, only import one of each.
Create a new main form with buttons to select each individual item
However if you are going to do this, suggest you consider splitting the database with all tables in a backend and the rest in the frontend. You might want to review your code at the same time to see anything can be done better.