Micromax Funbook tablet frozen at boot screen. No clockwork mod recovery - how to restore? I have a Micromax Funbook tablet (codename:P300) running Android 4.0.3.

While playing with a file explorer, I accidentally moved a file from /system folder. Yes, the device came as rooted and I had enabled root explorer and mounted the partition as writable. I  did so because I was mistakenly taken an assumption that I had installed Clockworkmod Recovery mod recovery.

Upon restart, the device does not go beyond bootloader image (it just says "Funbook" for ever).  I had attempted restart into recovery by pressing option button and then powering on.  To my nasty surprise, now only I realised that I had not installed Clockworkmod Recovery and landed on some recovery with following options:

Android system recovery &lt;3e>


Reboot system now 
Apply update from external storage
wipe data/factory reset
wipe cache partition
apply update from cache


Can anyone can help in restoring the tablet to original ROM? Even if I have ROM file, without Clockworkmod Recovery how can I recover?
This link helped me to flash a rom image. As an additional benefit, this ROM seems to be faster than Micromax's original ROM and also claims to support a list of 3G dongles.  The previous (i.e. original) ROM I had did not support Reliance and BSNL's 3G dongles.

As in a settings menu the following dongles are supported (I haven't got any 3G dongle to test):

WCDMA:
Huawei(E230, E176G, E160E, 182G, E1782, E1750 UMG1691), ZTE (MF633BP-1, MF633, MF637U)

CDMA2000/EVDO:
Huawei(E150, EC1261, EC122, EC156, EC1270), ZTE (AC580, AC2736, AC2746)

After re flashing, I installed clockworkmod recovery as per this link as well.