Hi Mr_Smartepaints and OverFlow.
Mr_Smartepants,
thank you very much. Your tip - on deleting \UBCD4Win\plugin\Driverpacks.net\MassStorage folder did the trick. ;-)
Let me enter into details - perhaps they come to be important to someone out there.
I've had to do the following - *in that order*:
1) Use DPs_BASE to integrate MassStorage Drivers into (the folder containing the files of) a bootable CD, which is DPs_BASE's first option.
2) Make use of your suggestion of deleting that folder you mentioned.
3) Use DPs_BASE to integrate MassStorage Drivers into (the folder containing the files of) my BartPE disc, which is DPs_BASE's second option - by the way, clicking on [Yes] to delete BASE when prompted.
Therefore - the way I see it - it's important always to delete the folder mentioned above *after* downloading new packages of drivers from DriverPacks.net and *before* performing those 3 steps I just mentioned.
Thank you all for your attention,
sorry for taking so long to post a reply on your help,
HPeron.
P.S.: I wish you all a Happy 2011!