exomizer sfx 58235 screen.bin,$400 -o screen.exo.prg

Plain raw files are loaded by adding an address to it using the @-character.
It is also possible to specify an optional offset and optional length if only a
part of the file is to be loaded. Like addresses, the offsets and the lengths
can be given in either decimal or hexadecimal notation using either 0x or $
prefixes. The offset can also be negative and will then be applied from the end
of the file instead of from the start.

<file name>@<load address>[,[<offset>][,[<length>]]]

* To load a raw file to 0x3456, append @0x3456 to the file name.
* To load a raw file to 0x0400 and skip the 16 first bytes and read the
  following 37 bytes, append @0x400,16,37 to the file name.
* To load the first 256 bytes of a raw file to 0x0900, append @$900,,256 or
  @$900,0,256 to the file name.