if you need an eboot check out jewels thread:
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Also to use an sprx you will need to create an eboot for it (unless its provided)... Check out
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Put your selected eboot in the eboot self builder and select file path on your ps3 (*note the accepted file path is "/dev_hdd0/tmp/" with your sprx plugins name at the end e.g. "SprxPluginName.sprx").
Now, using multiman or FileZilla locate where your eboot will be "/dev_hdd0/game/BLES01717/USRDIR" and replace the eboot in that directory with your modified eboot.
Finally, locate your tmp folder "/dev_hdd0/tmp/" and drop your sprx file in there (** Ensure your sprx has the same name as what you named it in the eboot self builder **).