Nice try! But is is nice :) Wonder how you did it.
First, i got the skin of the smrt livery from SMB23U. Then i
copied and pasted it over the SBS Transit's livery. For the front
end, i changed the colour of the bumper from purple to red and the
colour of the bottom half of the bumper to black, copied the edited
rego over, changed the colour of the roof and vola! It's done.