Some help with these extensions??

[Prince_of_Peace]

Hi experts, I like to change the sound, the video, the subtitle and even the menus in my PS2 games, some i can do, and some i can't figure out how. Well im not expecting to be able to do this on every game I buy, but I would appreciate any help on how to decode, change and ultimately encode these extensions. I even would appreciate any info about them, any website, tutor or even what they are for. Here is a list below:

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25 To Life HOG, PSS
Beat Down : Fist of Revenge PSS, XAF
Call of Duty 2 PSV, COD, TM2
Crazy Frog Racer PC
Fahrenheit BIK, "BIGFILE.DAT"
Fifa World Cup Germany 2006 BIG
Getting Up PK2
Harry Potter BIG
Ice Age 2 : The Meltdown PSS, PAD, BIN, 000
Judge Dredd : Dredd vs Death MIC, ASR, PSS
King Kong BIK, "DATA.BF"
Matrix : Path of Neo WAD, SFD
Metal Gear Solid 3 : Subsistence DAT
Need For Speed : Most Wanted BIG
Smak Down : Here Comes The Pain PAC, AFS, SFD
The Godfather : The Game VIV
Tomb Raider : Legend PSS, "BIGFILE.DAT"
Total Overdose NAZ, PS2
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I tried to be a tidy boy and make it look as neat as possible