Update: Version 2 is now available for download:

• Added to the installer the check of correct checksum of fatmsmod.prx. Use only encrypted or decrypted version of file.
• Music, videos, etc now work.

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Dark_AleX has released a new patch to load the FW 3.71 fatmsmod.prx on custom firmwares 3.80 and 3.90 M33.

The purpose of this patch is to load the fat memory stick driver of 3.71 in 3.80/3.90 to make memory stick reading work better.

From the readme:

• This process flashes the fatmsmod.prx as flash0:/kd/fatms371.prx, it adds a custom file needed to compatibilize the module with 3.80/3.90 (fatms371_friend.prx), and changes the pspbt* files.
• Note: fatmsmod of 3.71 usually works better because it has a better cache system, and usually reads on bigger blocks. (in some things is worse than 3.89/3.90 like sometimes reading more data than needed - lazy prediction -).
• However it uses more kernel memory, and it is unknown if it will have any kind of secondary effect running this module in 3.80/3.90
• The lags in np9660 no umd mode won’t probably be solved, as that is a different problem.

Check out the readme for installation instructions.

Download: Patch to Load 3.71 fatmsmod on 3.80/3.90 M33 V2

[Source: Dark_AleX]