Naruto with elisp

I just downloaded a huge Naruto (Manga) torrent which was organized like below

|- Chapter 001 to 010
|---- c001-p01.jpg
|---- c001-p02.jpg
|---- ...
|---- c010-p21.jpg
|---- c010-p22.jpg
|- Chapter 011 to 020
|- ...
|- Chapter 511 to 520
|- ...

I prefer to read my comics in cdisplay/comix which can read cbz/cbr formats. I was looking for an easy way of automating the process in elisp (buoyed by my previous success with the Luhnz algorithm). I was also itching to use this. My attempt at creating a script in one go was a failure and since I wanted to do it quick I used this

M-: (dotimes (i 52) (insert (format "cd \"Chapter %03d to %03d\"\n(dotimes (i 10) (insert (format \"\\\"C:\\\\Program Files\\\\7-Zip\\\\7z.exe\\\" a -tzip \\\"E:\\\\comics\\\\Naruto\\\\out\\\\%s.cbz\\\" c%s-*\\n\" (+ %d i) (+ %d i))))\ncd ..\n" (1+ (* i 10)) (* (+ i 10)) "%03d" "%03d" (1+ (* i 10)) (1+ (* i 10)))))

On running which I got this

cd "Chapter 001 to 010"
(dotimes (i 10) (insert (format "\"C:\\Program Files\\7-Zip\\7z.exe\" a -tzip \"E:\\comics\\Naruto\\out\\%03d.cbz\" c%03d-*\n" (+ 1 i) (+ 1 i))))
cd ..
cd "Chapter 011 to 011"
(dotimes (i 10) (insert (format "\"C:\\Program Files\\7-Zip\\7z.exe\" a -tzip \"E:\\comics\\Naruto\\out\\%03d.cbz\" c%03d-*\n" (+ 11 i) (+ 11 i))))
cd ..
cd "Chapter 021 to 012"
(dotimes (i 10) (insert (format "\"C:\\Program Files\\7-Zip\\7z.exe\" a -tzip \"E:\\comics\\Naruto\\out\\%03d.cbz\" c%03d-*\n" (+ 21 i) (+ 21 i))))
cd ..

Then positioning the caret at the first character for the dotimes line I recorded the following macro C-x ( C-k M-: C-y C-j C-k C-n C-n C-x ). This done, I ran the macro C-x e and held down the e till all occurrences were covered and I got this.

cd "Chapter 001 to 010"
"C:\Program Files\7-Zip\7z.exe" a -tzip "E:\comics\Naruto\out\001.cbz" c001-*
"C:\Program Files\7-Zip\7z.exe" a -tzip "E:\comics\Naruto\out\002.cbz" c002-*
...
"C:\Program Files\7-Zip\7z.exe" a -tzip "E:\comics\Naruto\out\010.cbz" c010-*
cd ..
...

I saved it as a bat file and let it loose and I had a neat little directory in which all the cbz files :). I'm sure there are more cleverer ways to accomplish this but, this was the easiest approach that I could think of (after a few failed attempts at nested inserts and let).