Applying pre-trained models about gta2cityscape

[NeverlandCookies]

Sorry for my disturbing.
I am trying to reproduce the result of gta as cityscape experiment.
My goal is to compare two models: 1) trained on gta5 data and evaluated with cityscape data; 2) trained with translated gta5 data and evaluated with cityscape data
If my understanding serves me well, the drn26-gta5-iter115000.pth pre-trained model is matched with my first goal and drn26-cyclegta5-iter115000.pth is matched with my second goal.
My questions are as follows:

1. If I only want to inference with the provided pre-trained models, do I need to run the scripts/train_fcn_adda.sh script? How can I specify that I am adopting a pre-trained model (Because I only find that there is specification of the base_models, but the train script is still going to start from iter 0, and train till max_iter, and the baseiter is only used to specify the pth file)
2. If I only want to inference with the drn26-gta5-iter115000.pth model on cityscape dataset for my first goal, do I need to download the original gta5 dataset (since scripts/train_fcn_adda.sh requires to specify the src dataset)
   Thank you very much and hope to receive your reply soon.