a) First, explain "how to encode the skin into r2skin format ":
You can see this about "How can I create new skins?":
www.rainlendar.net/cms/index.php?option=com_kunena&Itemid=42&func=view&catid=3&id=14707#14708
b) Please use the standard double-quotes "xx" (or use standard single-quotes 'xx'), instead use other kind-quotes.
c) About "dress.xml" :
I changed some values to make images to match the correct place.
d) About "element.xml" :
You are duplicate-define some elements, e.g. <bitmap id="bitmap.b00" file="images/b00.png" />
e) About "dress.lua" :
time = os.date("%I:%M")
--> it will get a time-string "time" e.g. time="09:05"
_, _, tHour, tMin = time:find("(%d+)

%d+)")
--> it will get two string "tHour" "tMin" e.g. tHour="09" tMin="05"
tHour = tonumber(tHour)
tMin = tonumber(tMin)
--> it will get two numbers "tHour" "tMin" e.g. tHour=9 tMin=5, but you defined the bitmap's id is like "bitmap.b00", you always need two digits, so please deleted them
Rainlendar_SetItemValue(window, "dress.hour", "element", "bitmap.b".. tHour)
--> it will rewrite <image id="dress.hour" x="18" y="171" element="bitmap.b00" /> as <image id="dress.hour" x="18" y="171" element="bitmap.b09" />
Attach the file that i had modified(because can only attach 120k file, so not including images)