This is a very old model and I think that both the doors and the baggage compartment shutter are mapped using the same texture portion: this is not a problem when the livery is symmetrical. Unfortunately, this is not the case of the FER livery (which is nicknamed "watermelon" for obvious reasons), so I think your problem cannot be solved.
As regards to the "stepped" aspect of the green area, you can try using the "anti-alias" function of your graphic software or you can double the texture size (be careful, because this can cause some loss of detail: in PhotoShop I use the "bicubic sharper" option, but even so the results are far from perfect.)
And gentlemen in England now a-bed
Shall think themselves accursed they were not here
UP844 - KUID: 69593 - Author ID: Pendolino - Join Date: Aug 1, 2002
TS2010 build 49933: 
TS12 build 61388 Collectors' Edition #405 
T:ANE: no, grazie! (ecco perché) 
TRS19: appena uscirà ufficialmente