While sleeving 24-pin, the wire stickers fell off!

[eponymous]

The answer to your question is that as long as you match the color to the pin, it does not matter if the new arrangement is different from your old within that color group. The ATX 24 pin supply has 3 main voltages, 3.3 (orange), 5.0 (red), and 12 (yellow) all positive with respect to common (ground). Each derives from their own single rail. The other voltage to make sure you get right is the 5Vsb (standby), this line is always hot when the PSU mains are on, though the computer is powered off. The -5V is almost never used anymore, and I think the most recent revision (I would need to recheck) actually lists it as optional, the other is the -12 V line, don't get that one in the wrong spot either.

A PSU tester is always a good idea, even if the labels never fell off.

he means that many PSUs have independent 12 volt rails, and you don't want to tie different rails together... this is true because you are not guaranteed that current will be pulled from each one in the right proportion.

However, since the OP was originally questioning how to rewire his 24 pin MB cable, his point is actually moot.

Thanks.

As I mentioned before though, there are two yellow pins for example. One pin has a single wire going into it and the other yellow pin has two wires coupled together going into it. Now I can only think this was done to allow more current ot be pulled along that pin, so in that respect don't I need to make sure it goes back in exactly the right place?