.B5I? .B5T? Help, need to burn disk

Hi I have 8 files here going:
Disk 1.B5I
Disk 1.B5T
Disk 2.B5I
Disk 2.B5T
Disk 3.B5I
Disk 3.B5T
Disk 4.B5I
Disk 4.B5T

My question is, how do I burn these So I can access their contents and use them as real Disks? Toastâ„¢ on my mac wont recgonise them but I also have Windows installed if I need to use that.

Thanks alot for any help!

These are Blindwrite images.

I suggest you ask whoever gave them to you in the first place.