There are a few things you can do to help sort this out.
- Is the file an uncompressed .TGA file? If it isn't, check the Tutorials board for info.
- If the file already is in the correct format, then follow these steps:
- Download The GIMP from www.gimp.org
- Open the file
- Ctrl-A
- Ctrl-C
- New 128x128 file
- Ctrl-V
- Save As
- Give it a different name than before
- File Type (By Extension)
- Targa
- Save
- Uncheck "RLE Compression"
Do this a few times, and give it some time.