Hey man, why don't you do it like this:
- find the right MAIN, FS and CDA for your phone
- upload MAIN and FS in SETool2Lite's "Files" section
- upload CDA in SETool2Lite's "MISC Files" section
- flash it all together and be out of trouble
- after this you can even use SEUS to check if there are any updates available for your phone
The most important thing is the whole process is freeware!
Be well!