I've found that most newer CD ROM drives will operate just fine on a previous - but fairly recent - driver. I just installed a 40X BTC and never changed the driver from my previous 23X Wearnes. Come to think of it, when I installed the Wearnes 24X, I didn't change the driver from my previous 8X Mitsumi! :-) Its IS important to review drivers from most of the old 2X and 4X units when upgrading to a current model, as most back then were proprietary. Fortunately, the world is a friendlier place now.
One good turn... usually gets most of the blanket.
512 Crucial PC2700
WD 80GB SE