Programming Pro Mini with Leonardo?

Hello,

i got a Pro Mini running as an "intelligent" light switch in my house.

Unfortunately a button in this project started to bounce more than usual and so i want to update my code.

For the inital programming i connected the Pro Mini with an Arduino Uno and had to remove the Atmega chip from the board.

Now i only have a Leonardo, so i can't remove any Atmega chip. (it's SMD)

So the question here is: How can i upload code to a Pro Mini with a Leonardo?

I have tried it out on linux 3.0.0 and windows 7 -SP2 64bit.