extract the savedata file, copy the file named saveData.dat and paste it into your game directory
(directory in C: Drive is C:\Users\yourname\AppData\Local\VirtualStore\Program Files (x86)\Capcom\Resident Evil 4)
if the games on a hard drive just drop it into the game directory

now take the folder called "in" and drop it into your game directory


Ingame you will have alot of saves and most of them are modded let me explain what the saves contain...

save 01 is the main game w/ Krauser
save 02 is Seperate Ways w/ Krauser
save 03 is the main game w/ HUNK
save 04 is Seperate Ways w/ HUNK
save 05 is the main game w/ Wesker 
save 06 is Seperate Ways w/ Wesker 
save 07 is the main game w/ Ada, her combat gear is SPECIAL 1, the dress she wears is SPECIAL 2 and her RE2 Gear is 
NORMAL
save 08 is just the vanilla seperate ways w/ Ada ._.
save 09 is the bit after leon loses his jacket, but in this save he still has it...
save 10 is seperate ways w/ Leon and his jacket from the begining of the game :D

> MODDED ASSIGNMENT MISSIONS < (Where things get g00d)
save 11 is Assignment Krauser 
save 12 is Assignment HUNK
save 13 is Assignment Wesker
save 14 is Assignment Ada only she has the dress from the main game
save 15 is Assignment Leon and he has the jacket from the begining of the game 
save 16 is Assignment Ashley xD (this mode is totally pointless, dont waste you time with it)


> Other Saves < (these are totally irrelevent)
save 17 will crash your game - dont load it
save 18 is the main game w/ ashley and is glitched since you cannot progress through the game cause u cannot kill
ganados
save 19 is the same as save 18
and finally save 20 is the same as 19 and 18...