Added additional info on selfextracting archive usage

README.md

@@ -46,12 +46,15 @@ $> git clone https://gitlab.com/bradley.richins/zpower.git
 $> cd zpower
 $> ./install.sh
 ```
+
 or download and run the self extracting archive
 ```
+$> chmod 755 zp-install.run
 $> ./zp-install.run
 ```
 
 - [Self Extracting Archive](https://gitlab.com/bradley.richins/zpower/-/raw/master/zp-install.run?inline=false)
+
 _NOTE:_ When downloading this from gitlab the file name will most likely changed from `zp-install.run` to `zp-install.txt`. As long as this file has exec prermissions it will work
 ```
 $> chmod 755 zp-install.txt