I totally agree if sharing were going on, but he was merely showing and did not provide a file to "his" modified version of the skin. I think a link was an adequate method of showing the origin and giving credit to the creator.
You and a couple others feel the link to the original skin was inadequate method of giving credit. I guess we'll have to agree to disagree. It's all pretty silly as I don't believe it was the OP's intention to not give credit to the creators or make it seem like it was all his. I pretty much did the same thing as the OP and I actually made my modified version available;
http://www.mp3car.com/vbulletin/rr-skins/68972-bav-weather-streets-trips-skins.html
It certainly wasn’t my intention with my modified skin thread to claim credit for the skins. Hell, I thought I was helping out for those who wanted these skins to match their main BAV skin. It’s not hard to go from BMV to BAV, but some what annoying and I figure this way the creators wouldn’t be pestered to do it, my contribution for all the great work they’ve done.
I converted 3 BMV style skins to BAV and I linked to the thread of the 'Streets&Trips' skin and thanked Chuck for the 'skipto' skin. I neglected to thank Guino for providing the weather skin so on that one I am guilty of not giving credit to the creator.
Oh and just food for thought, I was trying to customize the Alpine Skin for my brother’s Car PC and it was real annoying changing the buttons with just the .jpgs files. The skin creator didn't want to release his PSDs and that is his prerogative. I talked to my brother and we dumped it from the skin choices. Does the Alpine creator care? Probably not........but it’s one less person using the skin. Shame to as it’s a really nice skin, but needed a couple more buttons added for his needs.