NiravVyas 0 Newbie Poster

HI
I had been in trouble from last three days.Here is my problem:I allow user to upload a image of his/her choice,
then I resize it to a 45 X 45,Then make a copy of that in transparent.Till here all things were going fine.
Now I want it to cut from lower diagonal(The upper diagonal should get transparent ).Then After I need to convert it to cursor file.Isn't it difficult.
What do you have to say..??