IS POSSIBLE TO UPLOAD DIVX PROGRAM (PATCH) ON IT ??

If you are talking about the fact that this player zooms picture when playing divx and does not allow manual correction, my solution was to go out and buy a pioneer player today (DV-220VK). It's strange as the samsung plays normal dvd format fine but they have obviously got the divx playback wrong. So far the pioneer has been great!

'Standard' DVD players will not play computer video formats such as .AVI or .DIVX or .WMV or .MP4 whereas the 'generic' and cheaper (chinese) Players will support them (they will state that they support MPEG, DIVX and MPEG 3 & 4 formats).
Unless your ISO results in a properly DVD formatted media (with multiple files and file types including .DAT), it simply will not work.
Note that many 'standard' (and branded) DVD players will not support many rewritable CD or DVD.
Hope my information will help you assess your problem

This model cannot play real player video files your model work on DVD, CD, and on the following compressed file formats:

Compression formats - MPEG1 , MPEG2 , DivX 3.11 , DivX 4.x , DivX 5.x , DivX 6.0

Your player can play only mpeg , avi , and divx, not real player .rm files. I don't think there are many DVD that can play real player files around.

Is there a Divx logo on the player? Does this particular DVD player capable of reading DVD+R disks?

If you used the Divx converter program, there is a way to create a DVD in Divx format with menus. Did you use that particular program? If you didn't, you may have the DVD in a data format and the player can't read it that way.

Dear Shah ji,
I think Sony Service Center in UK can upgrade your DAV-DZ260 to play DivX files.
I live in Pakistan and can upgrade firmware if required.

Dvd movies required codecs according to different format so try to download divx codec which is very good and commonly used from www.divx.com and its free or click here http://www.divx.com/divx/windows/download/index.php
run it and enjoy

No Sir, You can't upgrade DVP-NS530 to play DivX format. This player has no ability to play DivX nor it can be upgraded.

this player does not support divx format.

it can play every thing but actuall matter is that which media player you have,some media player can't play all formats
so select like windows meadia player 11 ,power DVD,total meadia player
regards
prasanna

Using Windows Media Player You need Microsoft Windows Media Player Version 9 or higher and Sharp G.726 Audio Codec in order to play MPEG4 files from the Memory Stick on your PC. If you are not currently using Microsoft Windows Media Player Version 9 or higher. Important: The Sharp G.726 Audio Codec needed to play MPEG4 files is no longer signed by Microsoft. If Sharp G.726 Audio Codec is not properly installed on your PC, it will not play MPEG4 Audio. Using DivX® You can also download a free DivX® Player and codec to play your MPEG and other video format files. DivX® for Windows is a free codec built to play every version of DivX content. The DivX codec also plugs into your existing video software so you can view and create high-quality DivX videos at a fraction of the original size. The DivX codec also adds DivX video playback support to most popular media players.