Hi I have searched the forum, but it didn't seem I found too many infos on this tweak everybody is raving about. I've already tweaked my system to some extent until now (and it's running great so far) but if some further infos are available to squeeze any drop of performance out of it I'd glady get them. BTW my "Anus" goes something like this: Asus A7M266 MOBO AMD Athlon 1800 XP 512 Mb DDR ram 30Gb Maxtor 7200rpm HD (system Drive) 20, 30, 40 Gb 7200rpm Maxtor Audio drives (removable master/slaves on IDE 2) Matrox G450 Millennium Dual Head Video card Adaptec 2930 SCSI card Yamaha SCSI CDRw (for low speed red book burning) Waitec IDE CDRW (for ultra fast backups) IDE 1 slave. Digi 001 slot 3 IRQ 9 (forced in Bios) Pro Tools LE 5.1.1 and 5.3.1 Dual boot Win 98SE / Win XP Pro. Thanx for your help L.G.