Difficult to follow what the exact steps you have taken are. If you have only loaded the SATA drivers and not reformated with XP, then you will see all 4 HDD partitions.
Can you list what is on the drives C & D you can see now?
If you have gone ahead and formated using XP but before you have installed XP itself, then you might very well have wiped out your C: and E: partitions on the 1st HDD. For you not to be able to see the other 2 partitions on the 2nd HDD, would imply that you could also have formatted that HDD as well.
But this is all conjecture without you providing more details of what you have done so far.