Looks like Old iso images have been deleted.
Here is the longer method. If you got a modded ps2 you don't need to worry about pal/ ntsc.
If you got a modded ps2 (hopefully with a matrix or clone modchip) and a memory card follow these steps to save sms media player on memory card itself (so you won't need the cd again and again):-
1. Download Ulaunchelf boot cd from here.
http://sksapps.com/launchers/uLaunchELF_v4.40_CD.zip
2. Burn it on a cd.
3. Download latest sms media player from here.
http://sksapps.com/media/SMS_Version_2.9_R4.rar
4. Rename SMS Version 2.9 (Rev.4).elf to boot.elf
5. Copy boot.elf to your pendrive.
6. Put in the cd you burned in step 2 in your ps2. And start the ps2.
7. You should get a browser like apllication on screen now. Navigate to your pendrive Highlight BOOT.ELF and hit R1 and select copy. Now navigate to MC0 and hit R1. Select NEW FOLDER. Name the folder BOOT. Now go ahead and enter that folder. Now just hit R1 and select paste.
8. Now take out the cd and restart your ps2. Keep R1 pressed while you restart. This should automatically launch Sms Media player. Now whenever you want to run sms media player just keep R1 pressed while starting ps2 and it should work.
Alternately you can always put in ulauchelf disk and use it to run sms media player.