By the way, AmigaDOS can quite easily convert all your icons for you. For conversion, all you need to do is rename each .png image file to .info, and then provided PowerIcons is running (or a similar PNG icon tool), AmigaOS will be quite happy to use them as icons in the normal way.
Obviously it'd take you an age to rename each file in an icon directory, because there could be hundreds in there! That's where AmigaDOS comes in, because using the LFormat feature you can get AmigaDOS to write you a script which will do all the donkey work for you. LFormat is simply excellent - possibly one of the most useful features of AmigaDOS.
If you had a directory of PNG Images in "Work:KDEicons" and you wanted them all converted to .info files, all you'd need to type in a CLI window is something that looks like this:
list Work:KDEicons p="#?.png" lformat="rename *"%p%n*" *"%p%m.info*"" >ram:script
AmigaDOS should then create a script for you which will correctly rename all of those files, and it'll store the script as RAM:script.
All you need to do then is run RAM:Script and off it'll go! If you're curious as to how it does it, you can of course look at the contents of the script AmigaDOS has written for you using a simple text editor.
AmigaDOS rules!
Brian