I knew it was a plug-in for 3.03 oe-c when it was first released but I never DL-ed it out of fear. Now, I want it but don't know which way is right. Can anyone teach me step-by-step how to do that? Playing music while playing games? BTW, my CFW now is 3.52 M33.

just download the plugin, put it in the MSROOT/seplugins folder and then enable it in recovery mode, easy as that

You could also do it using iR Shell v3.6 and 3.52 M33.

well when i used irshell in the past, the music was all laggy and wasnt worth using, but idk if they fixed that in the update from a long time ago...

or you can use the irsmp3 plugin. http://www.psp-hacks.com/file/970 . it has an overclock feature to smoothen out the music.

I haven't tried it either to be honest.
But I know you can mute certain channels of the game audio, which could be useful.

OKay okay so here's the deal. I tinkered with the iRshell 3.6 for 3.52 M33 and frankly I don't like it lol no offense I just wanted music to stream while gaming so I messed up with it now I erased the iRshell with Red icon thinking it was useless since there were 2 right? Now, the mp3 while on iRshell won't play and even before this happened, some of the mp3 are messed up like it plays on 2x speed by itself on some mp3's. Is it possible I can only use the plugin without installing iRshell? I have the plug-in called irsmp3 something I'm really a noobie on iRshell so I love my things simple you see? lol

the plugin for the older FW works on 3.40 OE. i havent confirmed it on the M33 series yet. Check it out yourself.

I think the 2x speed thing has to do with the bitrate of the song. IRShell does that often with certain songs.

So how do you deal with that bitrate? What will I tweak then? I downloaded the irsmp3 plugin but it negates the plugin for autoplaying iRshell. And it doesn't do much really. I don't understand the idea of it and how to do it. I just enabled the VSH and GAME irsmp3 plugin in recovery and basically not much ever happened. I don't know what to do next though lol