PlatinumNANO, Download 'Merge.bat'
HERE.
Place it in the s1fwx folder.
Place your repaired dump.bin into the s1fwx folder. (It must be named dump.bin)
Place a full version firmware into the s1fwx folder. (It must be named full.bin)
Run the merge.bat and all the files will be copied from your dump into the full version firmware replacing all the files that have the same name and merge.bin will be created.
The host full firmware should ideally be of the same version as the dump.bin and be suited to your players screen size.
This does not always work and you may need to try a few different full firmware.