RND is right, you can absolutely not do it in the way you seem to want to. Another thing i often see is : a skin looks flat but it isn`t declared as being flat in its thme or skin file for several reasons.
You can either hack (NOT RECOMMENDED) your system files and create and use a .MSStyle specifically made to look exactly like what you want, or you can get the original authors permission to have that skin made into a Windowblinds skin
well for hacking student121571 seems to lack the skills, which is very normal.Am only able to patch some icon resources and replace simple ascii based text strings with same length in old dos applications.It would be very ( too!) risky to do it on a msstyle. Reshacker you would use then, but don`t explain more here to keep your system safe. Only in a virtualbox installation perhaps but does your computer have enough speed for that? Are you careful enough to prevent to much reinstallations/ virtual harddsik errors?
40 hours is what i did say maximal for creating a theme for a different os(linux) with a comparable not at all similar structure than windowblinds with a simple text editor and i have to mention that key areas pictures will be given to me, that i can let others do the most difficult designing tasks, the base structure ( border lengths / base color sheme) is already defined and that testing time is absolutley not included there.
Now think how much master skinners spend on creating their skins here. Its not as easy as it seems.