http://www.sqlstress.com/ - Doesn't support custom script.

http://www.datamanipulation.net/sqlquerystress/ - Very good simple tool, i was looking for some more detail output.

dvdstore - Link doesn't work

http://hammerora.sourceforge.net/ - Looks like this works only for TPC standards, might use this for base lining hardware.

Have you tried this one http://www.sqledit.com, this is not free but gives very good detail. Price is very reasonable.