You can use it if you want ;-))
I just uploaded the last version: http://hch.uwnet.nl/k-meleon/tmp/boxed_classic.exe
Jan.
It's not a bad variation on the default IE style skin Jan, but it would be better with an optional larger size toolbar. No offense, you've done some good work there but the small size icons had me squinting just a little to make out the icon. With the Phoenity theme, the good part about it is that Chee Aun has a small and large toolbar image set which means that you can opt for larger icons if needed. Downside is it'd be a bit more work on your behalf.
Apart from that I would say that the boxed_classic theme would be a suitable replacement for the tatty old IE5er. Question is has Andrew seen it yet? His judgement on these things is always pretty good so maybe he could have a look and tell whether it's good for inclusion.