How do I install MUI 3.8?

[2J4EZ]

UPDATE..

I Started again I format both partitions and done a complete fresh install of os 3.9.
I previously installed 3.9 over 3.5 now my icons look better on a clean install.
However mui 3.6 still wont install on my amiga or the emulator same error.
I'm going to call it a night for today and try again tomorrow.

Thanks for all the help ive been given so far

[2J4EZ]

MUI 3.8 is now installed.

For those having problems installing MUI3.8usr.lha unzip it with LHA, i typed:-

lha x MUI3.8.lha. I first placed it in the work folder unzipped it with LHA then ran the installer and it installed fine