Sadly if you want to use older clients you probably need to look into old versions of the EQEMu source. These are readily available on SourceForge among other places but you would have to compile the source and probably mess around to get it working (db and all).
Keep in mind that over the years Sony has decided to change the netcode (SWG/EQ2/EQ in a sense share netcode together). So the more current eqemu source has really no model to even work with the old clients as KLS mentioned.
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