Just want to customize my latitude position

[Henry Prag]

I've got my latitude badge loading my position in an iframe with:

 <iframe src="http://maps.google.com/maps?q=http%3A%2F%2Fwww.google.com%2Flatitude%2Fapps%2Fbadge%2Fapi%3Fuser%3D[MYUSERID]%26type%3Dkml&output=embed&z=10"

width="890" height="500"></iframe>

Which is ok but i'd like to be able to customise the placemark and that kind of thing. Eventually i'd even like to see if I can store previous latitude positions in an array and try and use some php to show a 'trail' of where ive been. Its for a website to show my location as I cycle through france.

Ive got familiar with KML but I'm really struggling with the basic stuff. I can't see to find a basic guide on some of the basic stuff. For example, if I created a simple KML file that customied the placemark and maybe added a description, i think I have to put it in a publicly acccessible location but then how do I reference it in my HTML? Do I also need to use javascript and can i still use the ifame HTML above?

Grateful if someone could help a KML newbie out!

Thanks

H