Designs and Decals

Afternoon Guys,

Bit of a weird one. Recently ive got back into Forza, and now awaiting FH4 which I can not wait for.

Anyway, thinking back I remember I have a lot of amazing tunes, designs, and decals on Forza4.
I thought to myself “Great ill go take a look”, but to then realise I’ve binned off my old 360…

If I were to log on to my brothers 360 with my log on. What are the chances of me salvaging any
of my priceless gems stored on my account? I’m assuming its all hard drive based, but how about
if I had anything on storefront? am I able to retrieve these said tunes or designs off the storefront
to be placed back at my disposal?