TXR2 Game Save Fix Help!

I need help on how to patch this game. I am stuck at this step....

3. Create the data ISO: MKISOFS.EXE -C 0,11700 -V TXR2_ECH -l -o C:\TXR2\DATA.ISO C:\TXR2\DATA
This will create C:\TXR2\DATA.ISO from the files in C:\TXR2\DATA\

Can someone please tell me what to do here...thx