hello everyone

i bought my xbox in 2002 and i installed a mod chip...unfortunatly i don't remember what it was...
There is a file in my hard drive (when i check memory in MS dashboard_ called Riot Crack Intro
also i used an ftp to check my hard drive content and i found the following files/directories:
on Drive C:
Directories:
xboxdashdata.17f14d00
Audio
Fonts
xodash
Files:
xbox.xtf
xbox book.xtf
settings_adoc.xip
xboxdash.xbe
on Drive D:
Directories:
BIOS:
EvolutionX V2.0.bin
EvolutionX V2.1.bin
EvolutionX V2.2.bin
Xtender V1.1.bin
each file has the size of 1mb (1,024 bytes)
Files:
Default.xbe
plzz plzzzz plzzz help me..... i don't know what's my modchip's name... i don't know how to update it.. and halo2 doesn't seem to work!!....
thanx..