Curieux36 released Personal Media Manager v2.90 for the general public, and you'll be surprised to know of the changes he's implemented on this new version. In addition to rewriting the interface, there's now support for newer firmwares, including the 3.10 OEs by Dark_Alex.

Since the changelog is pretty extensive compared to 2.87, wee'll just let you bask in the awesomeness for now. Here's the changelog:

General:

    * Complete Re writing of the interface of reception
    * The parameter setting of the path of homebrews is replaced by the path of the PSX ISO
    * Add support of the Sony firmware 3.10 and 3.11
    * Add support of the DarkAlex firmware 3.10OE

Manage PSX ISO :

    * Correct the crash during the encoding of some ISO (freeze on recording EBOOT.PBP)
    * Correct the crash of the copy when the direct copy is not checked
    * Correct many bug
    * Complete manage of PSX ISO File

Manage Homebrews :

    * Correct the bug of display Homebrews when ISO PSX is present on the PSP
    * Correct the bug of display of the homebrews pictures
    * Optimize the time of load

Manage movies :

    * Correct bug in the display of the name of videos on SONY firmware 3.x
    * Support of videos YouTube in the format FLV
    * Support of videos in the format MKV
    * Correction bug on video encoding in the format MOV
    * Optimize the time of encoding



- Source: [PSP Updates]