I want to boot any of the 2 OSes as always C:\, just like before... I've spent tons of hours, days reading the DiskDirectorSuite10.0_ug.en.pdf and all the posts here about how to use Acronis booting multi OSes always as C:\, but still have questions and queries with the methodes I have read, moreover I can't do that. 1st HDD SATA 150 - C:\ "XP_Work" 2nd HDD SATA 150 - D:\ "XP_Game" 3rd HDD SATA 150 - backup, programs 4th HDD SATA 300 - new purchase I've installed XP_Work and XP_Game "in a common way" before Acronis DDS was installed. 1.) My previous mobo was an MSI K8T Neo-FIS2R, supplied with 2x2 SATA controller ( VIA VT8237 & Promise 20378 ). It results that I was able to boot always as C:\ whether XP was installed on the 1st HDD or on the 2nd. I have 4 HDDs connected to the mobo, and on HDD one there is XP for work, on HDD two there is XP for game. I hadn't need any added software to boot any of the 2 OSes, 'cause the mobo's BIOS had the solution to hit F11 and choose which of the 2 HDDs I want to boot from - always as C:\! I've upgraded to new mobo (ASUS M2N-SLI Deluxe) with CPU plus a 320GB SATA300 and now - since it has (6) SATA connectors from the same vendor - I can't use my good old technic. I installed XP on the 1st HDD and after that to the 2nd - as for gaming, usual. Now my XP_Work is on C:\, but XP_Game is on D:\, which I'm not satisfied with. If I'm gonna take Batfink's advice, and install OSS to its own 100MB partition, and XP_Work onto a different HDD, plus XP_Game to a third one (I have 4 HDDs), I must hide one OS from the other, which seems that one will always unvisible and I can't use the antivirus software insatlled on XP_Work for example to scan that HDD (XP_Game) which is hidden. Think that my 2nd OS is only for gaming, which means that I don't want to install any additional software on it, just pure OS and games, so security programs and others always run from/under XP_Work, not XP_Game. 2.) The other question is how to copy my XP_Game from 2nd HDD, to the new purchased HDD - 4th one (the reason is the new one is faster). Since XP_Work on 1st HDD is the "base" OS and XP_Game on 2nd HDD is just an "added" OS, every attempt I made till now was unsuccesful: the new HDD (HDD 4th) is still unbootable (tried DDS and OSS "copy"-method). 3.) Where will the copied XP OS will take its place on one of my 4 HDDs, when I give COPY order from OSS?? I've tried this long-lasting manouver, but still have no clue where OSS did copy my XP_Game, so I deleted the result. Please help. Thanx in advance.