Can someone give me the secret to backing up in to a parking lot space between two cars? (not parallel.. )

Thanks ;)

There really isn't a "secret", but rather can you answer yes to "Can you control your car in reverse"? I'd practice controlling the car in reverse, first.
Pick a parking lot, try to back up as straight as you can.

Then, the problem becomes a series of judgements:
1) Your vehicle size relative to the space
2) Know driver's side space because that's what you can control.
3) Be aware of passenger side space (indirectly control).

Driveway backing you can get away with opening the door and looking down, but it won't work on an exam.

You also need to judge the end of the vehicle when backing up.

I passed with flying colours, I was just worried they would have be back in a space in a packed parking lots..

Thanks!