The guide is VERY old, way before DIC was available.
You can follow the guide up to number 12, unless otherwise mentioned by F1ReB4LL.
After this, you can use DIC for everything, I guess F1ReB4LL recommends subdump for the subs though
DIC calculates the offset for you, that value can be found in %1_disc.txt (where %1 is what you named the dump). (around line 175)
DIC automatically creates CloneCD-style dumps, aswell (with ccd, img and sub). So no need to use the original program.
For a Plextor the usual command would be:
DiscImageCreator.exe cd D: imagename 0 /c2
Where D: is the drive you want to dump from and imagename is what name you want to give to the image.