No worries Kain
Here's step by step what i did:

1. Reasonably clean Windows XP SP2 with all updates. Set up OS maxmem=600, pagefile=515~512 in SuperPI partition, and registry large system cache / clear pagefile on shutdown. Set Windows to run in Diagnostic Mode.

2. Set up CDT-IV folders and 3 x 632Mb files. I created the files using 1024x1024x632=662700030.

3. RAR the 3 CDT files into a single uncompressed .rar of size 1.85Gb.

4. Run OPB Cleaner

5. Reboot

6. Open SuperPI and prepare to run 32M, pause at 'Click OK to begin'.

7. Copy RAR file from SuperPI partition to other partition (note it was not to my C:\) - (1)

8. Rest

9. Copy RAR file from SuperPI partition to other partition - (2)

10. Rest

11. Copy RAR file from SuperPI partition to other partition - (3)

12. Rest

13. Check task manager and see 53xxxx / 54xxxx, or 55xxxx / 55xxxx, or 54xxxx / 53xxxx, or even 50xxxx / 54xxxx .

14. Run SuperPI


If you can please give me some pointers on anything in the above that would cause CDT to not give a better boost than just copying across a single large random file.
I even tried "balance method" where after doing CDT (3 copies) out of the SuperPI folder, i then returned all 3 files back into the SuperPI folder and my time was 1s slower, although both my Available and System Cache were higher (but balanced).