Default (Q) S4 Rom Porter Issue :( Helpp??

So I Have a US Cellular S4.. Wanting to try and port a S5 Rom to This Phone... But I can't even use this application... I put the 2 different roms in 2 different folders >> (Base and Port Folders..) But when it asked about the base... its says its an invalid rom... -_-... Any help?? please... I wanting to make a rom called "ReSerrect5" Rom... But I really need help... Can Anybody help me?