Unfortunately you can't override the initialize method which makes the call to VirtualEarth's loadMap function.
However you could create your own block...
1) Go to "My Page"
2) "Create a Block"
3) Search for Virtual Earth in the blocks list
4) "Rip It"
5) Go to "Block Code"
6) In the VirtualEarthClass.prototype.initialize method change the line:
to
7) Save the block
8) Go to "My Projects"
9) Share the block
10) Now you should be able to use it in a mashup, you could of also done the same without sharing it but other users might want to use it ![]()