Hiya Jane...not sure what SKD means? Best bet on the docklets that you download from here is to read other people's comments to see if they are running into the same problem and possibly the docklet author posted in the comments a fix. If there are no answers in the comments, try clicking on the author's nickname to bring up his profile. Most will have an email addy for contact. If none of that works, ask the question here with a link to the docklet so we know which one(s) you are having a tough time with.

Hiya...you should be able to just open up My Computer then drag-n-drop your drives onto the dock. As for the externals, while the total number you'd have connected at one time is showing in My Computer drag these as well. Then right-click on each of the new drive shortcuts and give them new icons thru dock entry properties. That way, on the externals, when they're disconnected and the link doesn't exist you won't get a big blue questionmark image and the dock will hold your shortcut image....I don't have any externals, so I can't try it out, but I'm pretty sure it'll work
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No Problem