So after gettig my installer to do almost everything that I would like it to do I now need to change the look of the installer that you see on run. I am not sure how to do this. I know that it has to do with the MUI but not what part. Would you all be so kind as to help. Thank you
You need basically to include MUI.nsh or preferably MUI2.nsh to redefine the gui layout, then you can tailor the interface to you needs by defining some macros.
The Modern User Interface documentation explain all the possible settings and also links to several examples that you should try to see what to integrate into your setup.
In your own NSIS distribution, these files are also installed in Docs\Modern UI 2\ for the documentation and Examples\Modern UI\ for the sample scripts.