I don't know what went wrong during installation. Go back to first page of this thread, read instructions again and follow them.
Loading ML will take a few seconds, not minutes and not at all 20 of them. If your camera locks for more than a few seconds I (and others) strongly suggest to remove the battery. No, it won't get better over time but worse.
Ciao, Walter
PS: More information, please.
- SD card capacity?
- Build number and/or date?