LW5 Java compatibility

Yes I downloaded LW5 to update my program, I have been using Lime Wire for a number of years and love the program. However after trying to install LW5 the program would not launch, I had an error message saying that I needed Java 1.6+ to run LW5, but it then told me Java 1.6+ is not yet available and to try Java 1.5. but that wont work. Clever error message.
I am operating on an iMac OP 10.5 with loads of free space, on Cable internet

Any other Mac users having this problem and you can resolve it, I would like to here from you. Lime Wire If you can read this lift your game, don't launch an update with out Ironing out the bugs, have you read all the feed back on this forum.