Here i leave this little program.

Links:
http://dax.psp-tuts.net/umddaxdumper.zip
http://rapidshare.de/files/19045790/umd … r.zip.html

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UMD DAX Dumper Beta by Dark_AleX

This tool can make a backup of your umd in DAX, ISO or GZIP format.

Options:

- "Dump to". Selects the destination directory, which can be one of:

* ms0:/ISO
* ms0:/UMD
* host0:/ISO - Note: this is for people which know how to use psplink, so they can dump directly to the PC via usb without writing to the memory stick

- Format: DAX, ISO or GZIP (note: gzip format is not supported by any loader, you'll have to decompress the gzip file with whatever compression tool like WinRAR)

- Compression level: it selects the compression level for DAX or GZIP format. 9 is better but slower, 1 is faster but worse, 6 is the compromise between speed and compression.

- Split size. Select the size of each part, or No split if you want to dump the full umd to a single file.
 
Notes:

* The split size is not supported yet for gzip format (you'll have to dump the full UMD at once for this format).

* To join the parts in windows, open a console and type something like this example:

  copy /b myumd.iso.dax.0000 + myumd.iso.dax.0001 + myumd.iso.dax.0002 myumd.iso.dax

* USB is activated with the program, so you can go saving each part to your pc hard disk(sometimes you'll have to remove the cable and insert it again to see the last dumped part file)

* In the dax format, the first fragment (0000) will be written the last and it will have usually only a few kilobytes.