I can't put games through itunes

[N1224J]

I'm sort of new into this whole jailbreaking and what not, I used to have ppsspp emu on ios 8.0.2 with games but they ran slow due to me not jailbreaking my phone. I recently upgraded to ios 8.1 and I do have the ppsspp on my phone because this time I did the whole jail break procedure though pangu. Only problem, I can't add games through itunes like I used to. I do have Iso files, I just can't manage to put games. Any help?