How to lower my ride? Please help a newbie.

[los-lowrider]

OK, I ordered two 235/60-15 tires for my 8" rims. I would prefer it to change my complete wheel set-up but for me this is not really easy because all nice rims are only to buy in the USA. This means for me that the shipping costs are sky high and that I won't be able to drive them street legal in Germany.
So I hope that this smaler tires will work that I can try my new suspension. All together I love the new stance but I think it's a little to low but we'll see.
I hope to get a new 18/20 combo in several months so what would you recommend me to take.
Thank you all again for your help and input. I will send pics when the bed is on the truck. As you can see on this thread it take some more time to get all the stuff to Europe but that doesn't matter the only thing that counts is that the targets are getting accomplished.
Thank you!
Michel