Bumpmaps...

Hello SimV,
I have an aircraft (for FS9 and FSX) that has Bitmap files for the textures, rather than DDS. Is it possible to make and use a 'Bump' with these files??? I have made a bumpmap from the rivets/panels, although making the alpha eludes me at the moment. When I create the 'normal map' with the Nvidia plug-in for Photoshop, I do not get an alpha channel, and I see no way of making one.
I looked at some posts about making Bumpmaps, and I can't see where I am going wrong, other than the fact that it may not be possible to do what I want to do.
Any help is very welcome., Thanks.
I have an aircraft (for FS9 and FSX) that has Bitmap files for the textures, rather than DDS. Is it possible to make and use a 'Bump' with these files??? I have made a bumpmap from the rivets/panels, although making the alpha eludes me at the moment. When I create the 'normal map' with the Nvidia plug-in for Photoshop, I do not get an alpha channel, and I see no way of making one.
I looked at some posts about making Bumpmaps, and I can't see where I am going wrong, other than the fact that it may not be possible to do what I want to do.
Any help is very welcome., Thanks.