EAGLELOUK  You can download them from "Stacks In Da Place" menu or just find them on google.  
(Version 1.0.1)

EAGLELOUK  Glad you like it ;-) I've made it in about 3 hours.

Sure it uses the "hand method", but you can spare a lot of time by using the application instead applying the method with your own hands :-D

thank you ;-)  
(Version 1.0)

EAGLELOUK  Can you explain what happens exactly ?

Thank you ;)  
(Version 1.0)

FROMAGE-HEAD  the icon does not stay at the bottom, it's replaced by new items  
(Version 1.0)

EAGLELOUK  Yes, right-click on the downloads stack, then choose "sort by > Name"

Personaly, I use to sort my downloads by added date. And because my downloads folder is always empty (when I download something, I use to place the archive in the trash directly, I hate my folders being messed up), I don't really care about the stack icon position, it will came back to front anyway when I send the useless file to the trash.  
(Version 1.0)

SHOCK J  It appears that what this application does is simply put a folder with a custom icon inside your downloads (or documents) folder and name it " " (blank). Giving it a blank name make it always appear first if you have your stack sorted by name. If you have it sorted any other way, this trick won't work. I personally prefer my Downloads folder to be sorted by Date Added. So this doesn't really work for me. Plus, the fact you have to have a blank folder inside the chosen Stack's folder is kind of disappointing. I like to keep my stuff better organized than that. Every time I see I want to delete it. While this is an interesting "trick," I wouldn't call this a true customization, especially since it only works for 1 of the 5 sorting presents a Stack provides.  
(Version 1.0)

FROMAGE-HEAD  I also use by date added, I'm not sure there is a trick for that kind of sorting.

But there is one for date sorting (creation and modification I think) by setting the date creation in a far future.

So this app is just adding a "no-name" folder, I'm not sure this is so useful. But at least I discovered nice sets of stack icons.  
(Version 1.0)

EAGLELOUK  In fact, the app just added an unnamed folder, but it has been made for users who know how to made a custom stack Icon with this method, but don't want to do it with their own hands. Stacks In Da Place just spare some time.

Whatever, if I can find how to make it works without creating a folder, it will be the 1.1 update then ^^  
(Version 1.0)

EAGLELOUK  Ok, I've checked Palette (a Shareware), and it does the same as Stacks In Da Place. Well I think there is no other solution for the moment. But, I'm sure that Apple will include a Stack preferences for 10.5.2 ;-)  
(Version 1.0)