It may be funny to you but your visitors, especially the less tech savvy ones, will find it highly confusing & irritating if there cursor starts behaving in manner they are not used to nor expecting and you will notice your traffic levels dropping off quite significantly. One of the first things I teach people about web development is that the only thing they should concern themselves with is the pages they are serving up to the visitor and to never try and "take control" of their browser or any other element of their system.
If you still want to do this, though, after that word of warning, let me know and I'll show you how.
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I could not agree more ... for the love of all that is sane and decent ... don't mess with the cursor!!!
I have a MySpace.com page and when i surf around on some of my friend's pages and the cursor gets changed ... it irritates the hell out of me and it is very hard to navigate the page using a cursor i am not used to.
And like pdrg pointed out, comet-cursor's are not only annoying, they are sometimes full of spy-ware/ad-ware type of pests.
Think about if you want to scare your visitors away or attract them. <

Thank you for your advices, I'll keep them in mind....anyway, the cursor I've tried on that forum (I lost the link ) wasn't bad (I hate useless things like you) because it showed a little fish icon only when the mouse was on a non-active word, returning to the classic cursor when on an active link. In that way, you use the classic cursor to navigate....can a css code do that, Shaggy?<

don't worry Shaggy, I'll try it on a temporary Snitz I use for tests only....where have I to add that line? In default.asp?<