That Hazama can't run in the new versions of Mugen because his common1.cns is not compatible with it, it's only compatible with the Winmugen versions, you will need to edit some code for that Hazama if you want to use him in that new version of Mugen.
GM makes good SF3 characters, but is a little difficult to download his creations, all is in chinese and you need to download various parts for the characters. Look in the links of his creations:
http://www13.atwiki.jp/mugen-complete-wiki/pages/36.html
Also, muteki, the same creator of a lot of GG characters makes a SF3 Sean:
http://drinvincible.hp.infoseek.co.jp/sean.zip
Well, a Ragna and Hakumen was released the other day, but, personally, i don't like so much this "arranges" of Blazblue characters, i will prefer some ones more accurates, but well:
http://mugenguild.com/forumx/index.php?topic=118219.0