Change mouse cursor.

You probably only have to work with HidePointer, ShowPointer, and DrawImage. Just draw your image at MouseX and MouseY, and use hidpointer to hide the normal pointer.

Global w=640,h=480					;Define Variables (I always make them global no matter what)
Global image=LoadImage("image.bmp")	;This would be your image

Graphics w,h,16,2	;Start GFX Mode
HidePointer			;HidePointer hides the normal cursor

Repeat							;Make a loop
	Cls							;Clear Screen
	Rect MouseX(),MouseY(),5,5	;Normally you would draw your image here, but for now I am drawing a Rectangle.
	Flip						;Flip onto Frontbuffer
Until KeyHit(1)					;Check If user has hit escape

Hope it helps!

[EDIT]: Sorry about my unorganized code. I'm still getting used to posting code.