I need to reinstall the code on my samsung AA5900262A (00262) remote control for the HDTV 1080i model tv. But i don't know what it is. Can you help me on this?

Hello,
This information is directly from the Samsung web site.
To RESET
If your remote control is not functioning properly,
take out the batteries and press the RESET
button for about 2~3 seconds. Re-insert the
batteries and try using the remote control again.

You can also easily access the user's manual for this product by clicking below: http://downloadcenter.samsung.com/content/EM/200501/20050113203228765_Champ_QSG.pdf
Hope this helps!
Sincerely, CBR2009

Do you mean you are looking for a replacement for this type of remote control? If so, there is one:

http://www.replacementremotes.com/store/productdetailp.cfm?productid=6149

Or are you looking for the code on how to reset your HDTV?