For starters, don't just immediately put the assets inside your SRB2 folder.

To use this model pack, first put the folder "CHERRI2" into your "models" folder in SRB2. 
(And make sure you have rendering settings set to "OPENGL" and in your OPENGL settings turn models ON.)

Anyways now for important stuff.

Here is the specific list of model names, for if you have other models you don't want to replace or lose! just slot these in and replace their counterparts (or add them if you don't have them)

HOWEVER, If you would just like to replace all the current models without being selective, or want to use alongside with the official Jeck-Jims models for the enemies and Eggman and such, use the models.dat file that's included, and just replace the model.dat file that comes pre-installed with SRB2.

Otherwise, here's the list:

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PLAYERS

PLAYERFANG CHERRI2/FANG.md3 3.0 0.0
AMY CHERRI2/AMY.md3 3.0 0.0
ROSY CHERRI2/AMY.md3 3.0 0.0
METALSONIC CHERRI2/METAL.md3 3.0 0.0
KNUCKLES CHERRI2/KNUCKLES.md3 3.0 0.0
SONIC CHERRI2/SONIC.md3 3.0 0.0
TAILS CHERRI2/TAILS.md3 3.0 0.0
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BOSSES

METL CHERRI2/METAL.md3 3.0 0.0
FANG CHERRI2/FANG.md3 3.0 0.0

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MODS

MCSONIC CHERRI2/SONIC.md3 3.0 0.0
DRPD CHERRI2/SONICDRPD.md3 3.0 0.0
POSE CHERRI2/SONICPOSE.md3 3.0 0.0
MCAMY CHERRI2/AMY.md3 3.0 0.0
MCTAILS CHERRI2/TAILS.md3 3.0 0.0
HLHA CHERRI2/AMYHLHA.md3 3.0 0.0
HMJP CHERRI2/AMYHMJP.md3 3.0 0.0
HANDDRAWN CHERRI2/VAMPIRESONIC.md3 3.0 0.0
SSNSONIC CHERRI2/VAMPIRESONIC.md3 3.0 0.0
FAIR CHERRI2/FAIR.md3 3.0 0.0
FLOB CHERRI2/FLOB.md3 3.0 0.0
KDRA CHERRI2/KDRA.md3 3.0 0.0
KDRB CHERRI2/KDRB.md3 3.0 0.0
TSWP CHERRI2/TSWP.md3 3.0 0.0
BLUESHOESTAILS CHERRI2/BLUETAILS.md3 3.0 0.0
ESPIO CHERRI2/ESPIO.md3 3.0 0.0
HEAVY CHERRI2/HEAVY.md3 3.0 0.0
PLAYERBOMB CHERRI2/BOMB.md3 3.0 0.0
VECTOR CHERRI2/VECTOR.md3 3.0 0.0
CHARMY CHERRI2/CHARMY.md3 3.0 0.0
MIGHTY CHERRI2/MIGHTY.md3 3.0 0.0