That's not how you play burnt PS2 games on your PS2. You don't need to burn them on special DVDs but I'd imagine even the softmod with hdloader is much too difficult for most of the people on this forum.
I don't think i'm entirly wrong
nomal data dvd aren't bootable rom a p2. in order to play them without altering the ps2 you'd have to burn them on a dvd that is already engraved with a pattern for the ps2
if i remmeber correctly the method you are reffering to implies taking of the lid and replacing it by a little piece of hardware that enables you to remove the cd containing the hdloader without letting the ps2 know you removed the cd (when you remove a cd the the temporary date it had is removed. so if you don't replace the lid you won't be able to use the hdloader) thus enabling you to put the dvd with the game and loading it tnx to the program still in it's memory
so even when you use a hdloader you have to alter the ps2 wicht means voiding the waranty
in case you know of another way i would really love to know