Ok dis is how you do it:
1. Check what recovery your using?
2.I'm using playfulgods recovery to get dis one go to(playfuldroidz.wiki) its a recovery.img place it on your sdcard using PC
3.probably you have one or those recoverys 5.0.2.6 or 5.0.2.7
4.boot into recovery if you know how?
5.*important make a back up of your carrent rom*
6.now do the wipes
*wipe data
*cache partition
*dalvik cache
7.now go into choose zip and find the rom your flashing (if says yes) flash it now wait let it do it thing after it says finished installed.
8.now go back into choose zip find your 'gapps' flash them as well then once finished go back again find ' mms-fix' find (reboot into system now)
Plus do this within the recovery let me know if sum bumpz lol
(Hint) the right answers good guide to on this go to 'playfuldroidz.wiki'