Restore Mac with time machine, consequences for itunes library

Ok, here is the problem, if there is one. (Using SnowLeopard)
(I want to restore my Mac because I want to install Windows 7 as additional OS. However, therefore have to install OS X once more because otherwise partitioning the disc does not work).
I want to set up the computer completely in a new way, but with the help of time machine, so that the computer looks exactly the same as before with the only difference that I will be able to partition the hard drive afterwards.
I am in particular concerned about how Itunes will behave in this situation:
Since I have a very huge Itunes library and it took me a lot of time to create it, I want to be absolutely sure, that it works afterwards in exactly the same way as it does now, that means basically: Not being necessary to import any music into itunes library again, instead the music should appear in exactly the same way as I see it now when I open Itunes with all the artwork etc. This should normally be the case with time machine. But it is getting more complicated now and this challenges me regarding my itunes preferences:
I did NOT go for "organizing itunes library by itunes" + did NOT go for "copying files to itunes library when importing music". THis basically means I use my own structure of folders, some of the music is located extern, same is located on the mac. Itunes work perfectly fine with this preferences until now. Timemachine does only back up the music located on the mac harddrive of course. However Itunes on the other hand can reach the extern music and play it in the same way as the music located on the mac. Me as a consumer, I do not realize when using itunes where the music comes from.
So if I restore my computer and using timemachine to set it up, will itunes still work in the way it works now? In particular will itunes still know where all the different media files are located and that some of them are located extern? I do not want to import 200 albums once more. Otherwise I forgo installing Windows.
I am not exactly sure how Itunes works and how timemachine behaves in connection with itunes (especially with my settings), thus I would rely in your help now. I would appreciate your comments. Thanks for your help.

christian111113456 wrote:
Thanks for the hint.
However, does this safe my problem? When trying to partition my harddrive, it always says that a file has been changed and thus partition is not possible to proceed. So if I clone this harddrive and then reclone it back, woudn't I get the same error?
not if you have enough space on the drive overall. the most common reason for this error is hard drive fragmentation. cloning to an external, reformatting and cloning back defrags the drive as the cloning is done on file level not block level. I thought that's what you were trying to do. doing a full system restore will achieve the same thing as it also defrags the drive. and the end result will be exactly the same if you do a full system restore or clone. why did you think doing a TM restore would work when cloning wouldn't? of course, you need enough free space overall to do it. how big is your hard drive, how much space is used and how big do you want the bootcamp partition to be?

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