making the animated bootskins

I assume by animated you mean it has a progress bar?
https://www.wincustomize.com/msgboard.asp?id=219204&BID=WC&page=1#226825

First, you cant make animated boot skins.
second, if you just copy an exiting file then change the info you mentioned the boot should work just fine.
Joeuser.com has a good tutorial on making a boot skin. If I can create one following his tutorial anyone can.

Here is the link to the Joeuser article:

http://martin.joeuser.com/index.asp?AID=1886

actually you can do an animated bootscreen, to a certain extent...
there was a prank boot screen made a while back that had the words (in command prompt format)

Now formatting drive C:

and then it did the blinking cursor with a block of black and white becoming the progress bar and it really did create the illisuion of a blinking cursor (the progress bar was like 4 pixils thick)

There are many interesting things you can do with progress bars. if manipulated correctly they can mimic animation

The scripting is rather easy
here is an example:
[BootSkin]
Type=0
Name = "iGlass 2"
Author = "basketweaver"
Description = "Part of the iGlass 2 series"
ProgressBar=Progress.bmp
ProgressBarX = 250
ProgressBarY = 403
ProgressBarWidth = 80
Screen=iGlass.bmp

*Name and author are pretty self-explanitory
*As is the description
*progressBar= is where you put the name of the progress bar file
*ProgressBarX and Y refer to the bar's positioning on the screen
*Screen= refers to what the backround pic is

i am not sure what the type= means though
just always put 0 there

i was wondering.. i made myself a book skin w/ the animated progress bar and as it animates the little bar leaves a black (which is my bg (the first in the palette) color) line instead of what was there before