Sony CD Extreme is a clone of Prassi PrimoCD, and these products have been neglected ever since Veritas bought Prassi (around a couple of years ago). As a result, even though the PX Engine update 358 includes support for the Plextor 4012A, these older unsupported products may not work properly.
If you like (as I do) the features and operation of the Prassi programs, your best bet is to download the trial copy of RecordNow Max
. This is the last generation of its type, and is more likely to support your Plextor than any Prassi-derived product.
Unfortunately, in my opinion, it is somewhat cripple-ware in that it has no opportunity for fully supporting the lastest burners due to Veritas's mishandling of this otherwise excellent burning software. Stomp is trying to fake it by using MMC commands to partially support burner functions, but full support will not be available if the PX Engine updates have been discontinued. For example, RecordNow Max will recognize the LiteOn LTR 52246S as a CD-RW but the available speeds are Max, 12x, 10x, 8x, 4x, 2x, and 1x. Obviously, a number of these speeds are bogus and do not exist for this model LiteOn. This demonstrates the serious limitations of Stomp's "drive support". On the other hand, neither Stomp's Click'N Burn Pro or Prassi PrimoCD Pro recognize the LiteOn as a burner even though the PX Engine 358 is installed (recognized as a CD-ROM instead).
In the final analysis, I still think that RecordNow Max may properly recognize and support your Plextor, as the Plextor 4012A was one of the last support updates included in PX Engine update 358. It might be worth a try if you're still interested.