Alrowan,

There is no such file as "mtw_logo_f1.BIF".

There is the original BIF "mtw_logo.BIF" and the BMP for the 1st frame "mtw_logo_f1.BMP".

If you used Bifreader to extract the frame, amended the BMP, then imported the frame again (into the existing BIF) you should have no problems - providing the size and name has'nt changed.

The "_Fn" suffixes are ONLY for BMPs - not the BIFs.

If you still have problems E-mail me your amended BIF and I'll take a look.