Instructions

Here are the Instructions for Elite ROMs and Custom ROM installation:

For Elite ROMs:
1.) Download Elite ROM.
2.) If you are L31 or 3GB RAM user, download Patch for L31 users too....
3.) Do Titanium Backup,,, its a cool app
4.) You Must only have Modded TWRP by HassanMirza01( In Elite TWRP Page )
5.) Reboot to TWRP and Backup Everything including Boot, Data, System, Product, Vendor, Version (Most important)
6.) Wipe Everything in wipe section (dont wipe sdcard) and Change FileSystem of DATA Partition only to f2fs(for Elite Roms v4.0 and up) & FORMAT Data otherwise phone wont boot,,, then reboot twrp and follow next steps if it dont mount data while installing rom, format it again and check filesystem from change fs option,if its f2fs, dont change it again,,,,,
7.) Go to Install Option in TWRP and install the Downloaded Rom zip.
9.) Now flash the L31 Patch if required (if you are L31 or 3GB Ram user) and you are done,,,, 

10.) Reboot with Pray :P

For Custom ROMS:
1.) Download ROM and vendor.img and also delete fingerprints form emui rom,,,
2.) Do Titanium Backup,,, its a cool app...
3.) You Must have TWRP installed.... ( In Elite TWRP Page )
4.) Reboot to TWRP and Backup Everything including Boot, Data, System, Product, Vendor, Version (Most important)
5.) Wipe vendor, system, cache, dalvic cache and data only,,, dont wipe Product or Cust, thats important,,,
6.) Now if you are coming from Stock ROM, then follow this step, otherwise skip it,,, Change FileSystem of DATA Partition only to f2fs & FORMAT Data otherwise phone wont boot,,, then reboot twrp and follow next steps if it dont mount data while installing rom, format it again and check filesystem from change fs option,if its f2fs, dont change it again,,,,,
7.) Now install the vendor image using install image option and then Flash the ROM zip in TWRP.

8.) Reboot with Pray :P