VIsta install error

> Hi
>
> I have managed to install the last ctp on my main pc and got it to dual boot
> fine.
>
> Now Beta 2 is not playing ball at all.
>
> 1 x 120Gb sata drive (current C: windows xp)
> 1 x 120Gb IDE drive (currently d: data)
> 1 40Gb IDE drive (E: Vista)
>
> P4 3Ghz 1.5Gb RAM x800 xt sound blaster audigy 2 liteon dvdrw
>
> First I try and install Vista from XP. I start the install and tell the
> setup to install Vista on to E:, it copies teh WIM file to my C: drive then
> starts to decompress files (stage 2) gets to 27% and asks to restart. Once
> restarted the new Vista bootsreen comes up and it continues the isntall,
> untill it gets back to decompressing the files where I get thie error
> "Setup unable to locate Windown image files"
>
> Lovely. I try again still same error. I re download the iso and burn it at
> its slowest speed, still same error. I have copied the dvd onto my data drive
> and run the install off that drive (much fast than the dvd isntall) and STILL
> the same problem
> I have also used a setup switch so that the temp files go to the E: drive.
> Still same error.
> If I boot up from the vista DVD and install Vista onto the H drive its fine,
> but the install then changes the vista drive to C: drive and renames my xp
> drive to e: (which was very annoying) After fixing this error and putting the
> xp drive back to C: my xp install is working fine but I really really want to
> install Vista now.
>
> Can anyone help me with this here?
>
> Thanks in advance.