Dell mouse MOA8BO - Can't find the driver for buttons/scroll

Sorry I couldn't find a mouse forum so I had to post to monitors.

Desperately looking for the driver for this mouse. It is a wired, dell mouse with 2 side buttons and a scroll wheel. http://www.techexcess.net/images/products/dell/dell-RP962-WS690-WS390.jpg

I'm looking for the driver so that I can configure the side buttons. Also the side scroll on the mouse doesn't work right now. I'm assuming it's because I don't have the driver.

Otherwise right now, once I plug into my laptop (Win Vista, 32-bit), the mouse works fine with the left and right click and vertical scroll. However I'm looking to configure the side buttons and horizontal scroll. Tried very hard to find the driver on Dell website (Drivers/Software) but this mouse isn't even listed. (in fact I'm disappointed they don't have any wired optical mouse listed at all)

Help please! Thank you so very much!