Hi,

I had the same problem, here's what you can do:

1. Create the spray file, 64 x 64, 64 x 128, 128 x 128, 128 x 256 or 256 x 256, save it it .tga format (supported by Paint Shop Pro)

2. Download Vtex from here: http://www.bloodsportgaming.com/hl2sprays/files/vtex.rar

3. Extract Vtex.rar and maintain the folder structure.

4. Copy the .tga file to the following folder: vtex\hl2\materialsrc\sprays\

5. Run the bat file tga2vtf.bat.

6. In the folder vtex\hl2\materials\sprays there should be two files, .vmt and .vtf.

7. Copy them to the following folder Steam\steamapps\[Your ID]\team fortress 2\tf[Language]\materials\VGUI\logos.

Now your spray image should be available from the drop-down menu. My logo would not show in the preview, but works fine in the game.

Hope this helps for you.