you don't have to modify anything manually... You simply did not select mass storage text mode from the GUI...
PLEASE LOOK AT / REFERENCE FIGURE 2 IN THE TUTORIAL
Since you did not select "mass storage text mode" you effectively told DriverPacks BASE to remove mass storage, and it did. GIGO (garbage in garbage out)
PS YOU ALSO FAILED THE VERY FIRST LINE OF THE INSTRUCTIONS
"Extract / install the DriverPacks Base program to a folder that IS NOT in your plugin folder - IE C:\DPsBase\"
from your log:
2011-05-23 07:37:00 : <CLNP> Create a DPs_Base.log backup @ C:\Dev\UBCD4Win\UBCD4Win\plugin\DriverPacks.net\BASE...
Clearly IN the plugin folder, contrary to the tutorial.
PSS Alternately you could have configured (added) Mass storage from PeBuilder plugins page as described in the lower part of the tutorial. The part that follows the line:
" Run UBCD4WINBUILDER.EXE or PEBuilder.exe and open the "plugins" page. "
AKA How to properly run BASE as a plugin ~ that is to say when you want to run BASE from within in the plugin folder structure
NOTE: It's better to do a "clean install" by installing DriverPacks BASE in a a folder that IS NOT in UBCD4Win and allowing BASE to completely remove the plugin and create a new one .