Depends on which bacteria you want to isolate plasmid from. It should be very similar, expect of cell lysis (step4), which may require additional treatment to open the cell. For instance, to isolate plasmid from Agrobacterium, it usually adds lysozyme at lysis step. Since it is fair quick procedure once you have solutions ready (you can use solutions from commercial mini prep kits), I’d suggest to try it using this protocol and see if it works. Also, if your plasmid is low copy (