Find string, insert one after (batch)

Hi all, I've spent a few hours with For loops and all sorts of things (using all the examples I can find on this site), but can't get a satisfactory result (mostly to do with the characters I'm trying to find and replace, I think). I have a registry file that looks like this: ================================ Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Valve\Steam\Apps] [HKEY_CURRENT_USER\Software\Valve\Steam\Apps\10] "userconfigcrc"=dword:146d9867 [HKEY_CURRENT_USER\Software\Valve\Steam\Apps\10090] "userconfigcrc"=dword:dbc74023 [HKEY_CURRENT_USER\Software\Valve\Steam\Apps\10150] "userconfigcrc"=dword:dbc74023 [HKEY_CURRENT_USER\Software\Valve\Steam\Apps\10500] "userconfigcrc"=dword:dbc74023 ======================= What I'd like to do is insert the string "EnableCacheLoading"=dword:00000001 Under each line that ends with ]. How would I achieve this using only inbuilt command line stuff (no external programs)? Extra bonus points if it doesn't insert the line under the HKEY_CURRENT_USER\Software\Valve\Steam\Apps key ;)

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