If your using a 9800 GT, I would look into cudaminer.  https://bitcointalk.org/index.php?topic=167229.0  You'll get much better kh/s with this program and can do scrypt, scrypt-jane, vert, and keccak.  The dev seems to be adamant about keeping one mining program to handle all the algos.

I understand wanting to save some money and get hardware that is a little older, but the new GTX 750 Ti seems to be a great kh/$/w card now that cudaminer has been heavily updated.  Look at this article  http://cryptomining-blog.com/tag/gtx-750-ti-cudaminer/  6 cards do 1625 kh/s at only 432 W... and $139 a card.    These are the R9 270's of NVidia.