Defcon

I got some question regarding web scripting. I would like to design my personal blog web site for SONY PSP platform. I also wanna to put some of my MP4 movie (what i know is SONY PSP support MP4 video format only) However i got a problem on my web scripting. Actually i want to do like this web someone surf with PSP browser and want to download my Mp4 movie file so PSP browser will ask like this :

"Do you want to save this file?
File Name: filename.MP4
Address:
http://www.domain.com/filename.MP4"

YES NO

*p/s If we choose YES that will be download

automatically to folder name --> /VIDEO/

I already try with this code:

<a href="http://www.domain.com/filename.MP4">download</a>

But my PSP web browser didnt come out with that quote like above. For example you can visit this web site.

http://psp.connect.com/product/spt-spider-man-3-new-trailer-for-psp.php

It is different result when you open with normal PC base browser (IE/Mozilla), so i advice you test with PSP web browser. So right now i want to know how i can scripting where PSP Mobile will be download automatically into Video folder on our PSP.

Thanxs