Burning .bin PS2 games...

[MrNiceguy]

Another little question by me...a friend of mine modded his playstation with a NEO 2.3....I burned some games for him but after they are burned I cannot see any discinformation in windows, the disc just keeps spinning. That friend tried the games on his modded ps2, but they do not seem to work, I burned them with cdrwin 3.8E @ 4x, I tried burning one with raw mode, but I got just one succesfull out of 4....then I burned 2 other games without raw mode, they were succesfull but I got the problem written above....the three games burned were three different version (PAL,USA,JAP)......
what am I doing wrong?? Are my copies not allright or is it my friends ps2 that's not propperly modded?? Please help me..

Greetz MrNiceguy