First things first: Hi everyone, this is my first post and from what I see, my problems are marginal in comparison to those of others. Nevertheless, any help would be greatly appreciated! Apologies: I searched this forum to a certain degree, and even though I found related stuff, I have the impression that almost everybody has highly specific (aka non-transferable) problems. So have I. Stuff I have: Vista Home Premium (SP1, mildly tweaked and vlited, up to date), DiskDirector 10.0.0.2161, OSS 10.0 (build 2161), also TrueImage 126.96.36.19905. All this is on a Dell Laptop (Inspiron 6400) where I run a well kept harddisk without any hidden Dell partitions. Instead my internal harddisk features: C: The Vista together with very few select programs (primary, usually active) D: All other programs (logical) E: Data (logical) Acronis SecuryZone with Backups The idea: I have a very obscure issue with the integrity of certain program that I simply need to run from time to time, but that utterly screws my system. Therefore, I wanted to have a second (booting) system for the sole purpose of running said program independently from anything else. Diskspace is valuable on the internal harddisk, so I wanted to set up the alternative system on a partition of an external USB drive. The plan: Was to create a copy or make a new installation of vista on a prepaired partition of the external harddrive, employ OSS and voila. This naturally failed. The problems: 1. Creating a second system partition I tried several things. First I thought I could just use OSS copy function. This makes OSS crash, the problem being somehow related to the ntdll.dll. Alternatively, I tried to use the clone function of TrueImage, which I aborted, since it wants to clone the whole disk and not a selected partition. I considered to retrieve a system backup with TI and place it to the new partition, but settled to use the copy partition function of DD, which did the job. WHAT I DON'T KNOW AND UNDERSTAND HERE, is if OSS (if functioning) would already do something about making the new alternative system understand that it's not on C anymore. With my method, it is quite clear that the copied version doesn't know about its relocation. 2. Working with OSS OSS looks nice, as long as you access it in the regular Windows environment. The loader version seems flawed, though. First my mouse behaves like it had 27 espressi. OK, no big deal. Bigger deal is that sometimes the system stops before enetering the selector GUI. After a reboot, it will work, but after choosing a system to boot it will stop again. The only choice that works is to deactivate OSS in the selector GUI. Note that this behaviour is not regular. In all my experiments it worked more often than not. OSS recognizes my two systems fine. From what I can see, I cannot hide them from each other though. I cannot boot my alternative system though, because Vista doesn't find some bootsector or whatnot. 3. Making Vista do it Vista doesn't like USB Disks, I understand that now. My BIOS can (in the setup as well as in the boot menu) but Vista doesn't want. I found online solutions, where it is explained how to tweak the registry of the external system, so that it boots. I tried that and it worked to the degree that the initial booting actually really starts from my external disk, but then it happily starts to use the system files of my original C. I guess because that is not hidden and a lot of the parts of the alternative system still point to C. I am too amateurish to find and change those signposts myself. 4. Back to OSS So I thought: Isn't there this nice Folders/Data feature in OSS. If I understand correctly, I can actually tell my alternative system where it finds its folders (partition J, NOT C). But when I had a look, what did I see? The partitions page of the properties option of the two systems showed the partitions of all drives screwed up driveletterwise. J had become D (the alternative system), E had become something else, and so on. So J (which was now called D) still had its folders in C but its bootthingy file in D, which was, when I looked in DD still J! So DD tells me everything is like it should be, but the OSS plugin shows all screwed up driveletters. At this point I stopped. Am I on the right track at all? I appreciate all and every comment! Thanks so much in advance!