Thought I would post up a detailed guide on everything you need for the Saxo VTR alternator conversion as I didn't found any with the aim to solve,hopefully,any doubt and to avoid purchasing wrong parts.
Correct Top and Bottom Brackets Diagram:
Bottom Pulley
You can re-use the standard VTS pulley,it does not need to be replaced with the VTR one,I had to change mine as it had play so I just went with the aluminum one.
Top Alternator Bracket
This one is both fitted to the VTR and lower spec models like the 1.1 petrol,the only difference between these is that the 1.1 and other models,VTR excluded,have a hole in the upper portion of the bracket so that an heat shield can be fitted as seen in the above diagram.
This comes complete with the tensioner for the alternator belt.
Side view:
Bottom Alternator Bracket
This is unique to the Saxo VTR and what you'll need.
Alternator
Same as the bottom pulley,you can re-use the standard VTS alternator.
Alternator Belt
You'll need a 5 PK 710 belt,this is fitted to many vehicles but all you need is the part number so you can go to any car dealer and order one,just for clarity it will be a 5 ribs belt with a total length of 710mm.
Will I need to make new holes in the block?
No the holes are all there for both the top and bottom bracket,the only thing you'll need to do is to make a few new threads for the bottom bracket,you'll need a standard M8 x 1.25 pitch tap and die set.
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This should cover it all,if any doubt emerges please post in this thread and I'll do my best to help.