Well you've actually got about 90% of the work done already.
all you need to do is
make a .toc and a .lua file
making these is easy I'll use Windows "Notepad" for example here.
open a note pad go to file>save as
on the bottom change the "Save as type" to "All files"
then set the filename as "youraddonname.toc"
that will make the .toc file, now you gotta put info in it, open it (notepad works for .toc and .lua files)
Code:
## Interface: 50400
## Title: Addon name
## Author: your name here but this line is not necessary
then put this in the .lua file (you make this just like the .toc file except you use the .lua rather than .toc in the file name)
Code:
LoseControlplayer:SetFrameStrata("HIGH")
LoseControltarget:SetFrameStrata("HIGH")
LoseControlfocus:SetFrameStrata("HIGH")
LoseControlparty1:SetFrameStrata("HIGH")
LoseControlparty2:SetFrameStrata("HIGH")
LoseControlparty3:SetFrameStrata("HIGH")
LoseControlparty3:SetFrameStrata("HIGH")
LoseControlarena1:SetFrameStrata("HIGH")
LoseControlarena2:SetFrameStrata("HIGH")
LoseControlarena3:SetFrameStrata("HIGH")
LoseControlarena4:SetFrameStrata("HIGH")
LoseControlarena5:SetFrameStrata("HIGH")
after that you manually instal the addon in your WoW folder>interface>addons