[Warner306]

Hey,
Can i install this along side my existing Kodi install and switch between them both, or will it overwrite it?

Yes, as stated, a portable installation is possible.

1. Start the installer and choose a directory with write access not occupied by your existing installation:

e.g. C:/Downloads

2. Tick the option in the installer to avoid adding Start Menu shortcuts.

3. After installation, create a shortcut to Kodi.exe.

4. Right-click on the Kodi shortcut and select properties. Under target, add the -p switch as below:

target: C:\Users\USERNAME\Downloads\Kodi\Kodi.exe -p

Hi Warner306.
I applied this theory for Kodi Krypton Nightly build , following the wizard Kodi setup I left out (overwrite) instead to continue installation with overwrite I continued the wizard (NO) Installation complete success without overwrite Kodi DSPlayer that has a different path by Kodi Krypton Nightly build.

Kodi Krypton : C:\Users\USERNAME\Downloads\Kodi
Kodi DSPlayer : C:\Program Files (x86)\Kodi

install Kodi Jarvis 16.1 + dsplayer * (05/03/2016) in C:\Program Files (x86)\Kodi through wizard Kodi setup I did overwrite for install Kodi Jarvis 16.1 + dsplayer * (05/03/2016) with success , only that , Kodi Krypton is been deleted from its path It was only saved folder (portable_data) where am I wrong ?

I'm not sure. Try installing the portable version again. Remember to create a shortcut to Kodi.exe and add the -p switch to the target field in the shortcut properties.