This how to install Arabic script in windows XP. If you don’t have the windows CD then download this:
then follow this step by step installation:
If you have windows CD ignore this step.
Extract the archive you download (better to be on the desktop).
Go to Regional and Language options.
Go to Languages tab, and check “install files for complex script and right-to-left languages”, then press OK.
Go to Advanced tab and choose from the list, then press OK.
You will be asked to insert the Windows CD and then press OK. If you don’t have windows CD see the next steps.
Click browse, then go to the files you have extracted and select the files needed. (may be you need to do this more than once)
Press Yes, then Yes to restart.
Thats all. Hope it works for you.