I just know this ^
Since this is a client script so
function replace ()
outputChatBox ( "> replacing the euros vehicle" )
txd = engineLoadTXD ( "data/euros.txd" )
engineImportTXD ( txd, 587 )
dff = engineLoadDFF ( "data/euros.dff", 587 )
engineReplaceModel ( dff, 587 )
addEventHandler ( "onClientResourceStart", replace )
but data means inside the data folder in the same directory of the script, right?
Just like in html?