There's a toolset from Microsoft for that purpose: Windows AIK (Automated Installation Kit). Among other tools, it contains DISM (Deployment Image Servicing and Management) which can build custom WIM (Windows Image) files with preinstalled software. General idea is that you install clean version of Windows, add software of your choosing, and then pack it up to custom WIM using DISM from AIK.
Software is only ones & zeros. You can't 'break' anything. If something doesn't work, scrap that version and try again. You will not get it right the first time unless you have no expectations.
You can't tweak everything, most you will have to do after the modified O/S is installed. It's a trial and error (mostly error) process.
1. I find it best to copy an extracted (uppacked) Win7 w/sp1 ISO to a SSD (if you have one). You can use the ISO, but it takes longer.
2. Be sure you have a dedicated original extracted copy of W7 sp1 in a safe place. Do not use that for your source since it will be overwritten.
3. Place the needed RT7 folders in the root of that drive on a partition w/o a O/S installed.
4. The more you call on the program to do, the longer the process. Adding updates (I had 106 security only updates) at least doubles the time.
Note: All of these attachments can be opened in a separate tab and saved to be printed out for your convenience.
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