The program I use at the top for the shortcut icons is called ObjectDock, available from stardock.com.
What are you stuck on with samurize? I'll try to help
With the gradient colour, do this:
Click on the meter in the samurize editor & choose the general tab.
Next, underneath Alert Properties choose Value is over and 80 for the value.
Next, click on Alert colour and choose your colour, e.g. green. Do the same for Alert colour 2
Next, click on the display tab
Then, do the same with start colour & end colour
Choose alpha start as 200 & alpha end as 255
Then choose split spacing as 6 pixels, for example
Have fun