Thank you Simon, although, I have spoken yesterday to a friend of mine who has done this job 2 years afo at a mechanic's garage that doesn't have the special tools required, and as it seems they managed to do it properly, he has got the same belts for 70k miles now and everything is running properly
Now I am not at all arguing and putting your knowledge under the question mark Simon, I also know that this is the way to do it 100% as you should and I am only thanking you for all the info you provided, I am just wondering how they managed to do it without the tools, I also asked him this and he said that they told him then that the tools are not a must-have, although he didn't further ask how they exactly did it.