The data in the .csv file are not actually truncated--it just appears that way if you open the file(s) in Excel because it can only read 255 variables. I believe Excel 2007 can read a practically unlimited number of variables, or you can import the csv file into SPSS, as described here:
http://www.empirisoft.com/support/showthread.php?t=498
Let me know if that helps.