It's possible to change the default icon on a map.

{mosmap icon='<Url icon>'|iconwidth='60'|iconheight='52'|iconanchorx='58'|
iconanchory='52'|iconinfoanchorx='34'|iconinfoanchory='1'|iconshadow='<Url shadow'|
iconshadowwidth='60'|iconshadowheight='52'|iconimagemap='<image map>'|tooltip='Tooltip'
|text='Custom Icon'}

Even an animated icon (.gif) works:

For a icon wizard goto Google Map Custom Icon Maker.

The parameters have the following meaning:

• imageurl - url to the image for the icon. Can be a jpg, png or (animated) gif.
• iconwidth - width of an icon
• iconheight - height of an icon
• iconshadow - url to the image for the shadow of the icon. Can be jpg, png or (animated) gif.
• iconshadowwidth - width of the shadow
• iconshadowheight - height of the shadow
• iconanchorx - the x coordinate within the icon for the point that is used for the location.
• iconanchory - the y coordinate within the icon for the point that is used for the location.
• iconimagemap - define the clickable region of the icon as a poly for series of X,Y points. The final coordinate closes the poly by connecting to the first coordinate.