as you say if you label certain parts of it , it may well make life a lot easier. maybe take a few pics for reference, if you come to any problems tackle each one at a time, go for it mate if your feeling up to it. If u can its always good to have some help at hand too. At least you tidy any suspect areas prior to installing it and you,ll feel good once it all comes together. What is wrong with the loom in the car at the mo?