Lucy, you rock!
I found a full path in the PHPInfo file and changed the paths to what you suggested and everything works - thank you so much for taking the time to check out the thread and post the working answer.
Just for my future reference (and anyone else using (mt)) here are the paths that worked:
File Manager Path:
/home/77777(your mt prefixnumber)/domains/yourdomain.com/html/
Resource path:
/home/77777(your mt prefixnumber)/domains/yourdomain.com/html/assets/
Resource path:
One thing I did before changing the paths was change the version of PHP from 4 to 5 (noticed this in the (mt) manager area) - but nothing worked until the paths were changed so don’t know if the php version matters.
Also, I changed the Resource Path to "assets/" as I discovered that using Lucy’s path will not make relative paths to your assets.
Thanks again to Lucy, j_P and Bob - your help and suggestions have made the steep learning curve a lot easier (and thanks Bob for your help on the other threads as well).
Cheers
Ben