How To Install Custom ROM in Micromax A35

Download any custom ROM of nandroid type, i.e., in .img format.

put that in your sdcard>clockworkmod>backup>"put ROM here (folder)"

if you dont have above folders, just make new folder, name it as above.

1. Root your Phone.
2. Flash CWM (adb method or mobile uncletool method).
3. Boot Into  CWM Recovery (Mobile Uncletool will help you to boot into recovery).

Now in CWM. (Only Hard keys will work.) (step by step)

1. WIPE DATA.
2. WIPE CACHE.
3. BACKUP AND RESTORE.
4. RESTORE.
5. (select your ROM).
6. YES.

Wait Untill ROM flashes Fully.
then Go back and REBOOT SYSTEM NOW.

Congratulations, you have successfully flash new ROM.

Note: All Above methods are tested. To perform Particular Step, Go Deep into my blog, you will get everything needed here.
Also First backup your rom for saftey, or otherwise, you gonna finish :P
If you Made Brick your device, then unbricking trick is also in FLASHING CWM post down there. :)