You don't need to know the best mod... just download them all! Make sure you get Matryx's mod launcher first though. (he ought to pay me for all this free advertising=-)
My personal favourite mod is devnullmod, but it's a little out of date now. Wasn't someone working on a new mod which was rooted in devnullmod?
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SE4 Code:
L GdY $ Fr- C- Sd T!+ Sf-- Tcp-- A% M>M+ MpD! RV Pw Fq+ Nd- Rp+ G-
/SE4 Code
Go to
my meagre SEIV pages to generate your own code.