Actually, you can make use of KProbe on any DVD compatible drive from LiteOn. Problem is though that the results of such a scan can't be compared to any of our "official" scans, made with LiteOn DVD burners.
This method is good though for comparing different media and their quality when written on the 2500a (or so).
For example, first read a disc with CD Speed or DVDInfoPro. If the results are fine (steady curve and no weak spots/errors) run it through Kprobe. Do the same with other brands etc. You won't know any real PI/PO values, but you will be able to compare the differences between certian media.... and that is quite important info, isn't it?