I just finished retrofitting a mchine and was going to test it when I realized there was no parrallel port on the computer I was going to use.  Oops.  I found this one:

http://www.cnaweb.com/pci-high-speed-parallel-port.aspx

It claims to work better than an MB mounted LPT port.  Anybody found any correlation between performance with Mach and MB VS high performance plug in LPT port? 

I went ahead and ordered it because a Smooth Stepper is just a little more than I have left of my allowance right now.  Its EPP so it shoud work fine. 

Should work, how well I can't say,but, you will find out. Hopefully the drivers they supply for it will be appropriate for it and your operating system.
RICH

Works great.  I need to slow down the machine a bit, but it works fine.