No offence taken, I appologise if I didnt make any sense my head was still spinning from reading all that info

.
I started looking at booting xp from usb after the vista oem dvd (which launches a ghost image) bizarrely merged two partitions together. One contained the o/s the other my data..
Thanks for your reply jaclaz

: . Basically this is what I want to do:
1) be able to install from a usb hdd partition into another partition on the same hdd or internal hdd as a failsafe
2) and or have a full working xp which I can use as a recovery tool.
Thats it really.
First of all I will try the methods you've suggested & report back - beginning with the "old method -
(kinda did forget dos couldnt read ntfs)
QUOTE
4) This simply makes NO sense whatsoever.
DOS cannot access NTFS, it is possible to add NTFS capabilities to DOS, through the NTFS4DOS package from Avira, but it would represent yet another variable that could cause problems.
Read here about the "old" method to install via DOS and WINNT.EXE:
http://www.911cd.net/forums//index.php?showtopic=16713I have the feeling that a probably working method you should look into is this one:
http://www.msfn.org/board/index.php?showtopic=121446(using a booted PE to install the XP)
You have cleared up the confusion of what files are needed
QUOTE
About Server 2003 SP1 files, trditionally three files are used:
1. SETUPLDR.BIN
2. NTDETECT.COM
3. RAMDISK.SY_/RAMDISK.SYS
But further research has shown that:
* SETUPLDR.BIN is NEEDED
* NTDETECT.COM can be substituted with any XP/2003 one
* RAMDISK.SY_/RAMDISK.SYS can be substituted by SOME other XP versions.
Second of all-
Ok I hope this is more clear:
1) I used usb multiboot to copy the source to partion 1 of the usb hdd, when getting to the partitoning stage of the setup. Couldnot create other partitions as it saw the raw space as a 'removable disk'. Thus I tried the recovery console
however was unable to launch winnt.exe from the $winnt~ls$ folder kept getting access denied..same with other dirs when using the chdir command.
2)Mounted iso via u3 customiser (be warned this reduced my 16 gb usb to 2.4 gb! course I panicked) when i saw it what it did

. Was able to boot but upon loading windows setup (txt mode) the usb would reset and voila a bsod. (however i didnt copy the ramdisk, setupldrbin files from the win 03 sp1 into the iso which was mounted).
3) Used usb multi boot this time on a usb stick (san disk cruzer) h/e the U3 launchpad must be removed must be removed (here is the link
http://www.instructables.com/id/Using_U3_T...n_an_8G_Cruzer) otherwise the bios will detect 2 mass storage drive instead of 1 and will just hang with a flashing "_". Also the link has an alternative method for mounting the iso via U3 without drastic space loss.
However was able to boot, create partition, format but unable to install - "setup cannot create folders: /windows"
4) tryed to copy the source into partition one and boot of it - which I will look at again after awhile when I've got nothing to do and got xp booting of the usb hdd as this seems to be the 2nd simplest method which I could pass onto my friends.
This i tried so I could learn something new-
5) I was reading Dietmar's tutorial and installed via my orig xp cd onto the usb hdd (partion 2) so I would get a fresh xp with pretty much all the files including the reg hive which seemed to have been locked *_* by XP (using a 500 mhz dell with 256 mb ram yes i know its slooow which is probably why firefox suddenly kept reporting the link to Dietmar's tutorial was broken

) .
Hope this makes sense and isn't verbose.
Once again thank you jaclaz for the links

Once again appologies for the long essay..
Best regards & many thanks
JP