well i found the solution myself
will post it here, might be of help to others....
This guide will take you through the steps in burning a pre-prepared Windows Vista / Windows 7 installation source directory to a disc.
Note: Instructions wise, Windows 2008 should be basically the same as Windows Vista, and Windows 2008 R2 should be basically the same as Windows 7.
My source directory (which I've called 'VISTA_INSTALL') looks as follows:
That's everything you'd get on an original Vista installation disc. If you're missing bits (e.g. the 'boot' folder), it probably won't work.
Right, let's begin!
1. Load ImgBurn!
2. Click the 'Write files/folders to disc' button.
Note: This is basically the same as switching the 'Mode' to 'Build' and setting 'Output' to 'Device'.
You should now see a screen like this:
3. Insert a blank (or erasable) DVD disc in your burner.
Note: The message in the status bar should now say something along the lines of 'Ready'.
4. Add the installation source folder to the 'Source' box.
5. Switch to the 'Advanced' tab, and then to the 'Bootable Disc' one.
6. Enable the 'Make Image Bootable' option.
Set the 'Emulation Type' to 'None (Custom)'.
Point the 'Boot Image' to the 'etfsboot.com' file within the 'boot' folder in your source folder - i.e. "T:\VISTA_INSTALL\boot\etfsboot.com"
Enter 'Microsoft Corporation' in the 'Developer ID' field.
Enter '07C0' in the 'Load Segment' field.
Enter '4' in the 'Sectors To Load' field if your etfsboot.com file is 2K in size, enter '8' if it's 4K. (Basically it's the size of the file in bytes divided by 512 - i.e. 2048 / 512 = 4)
Note: Vista's is normally 2KB and Windows 7's is 4KB... so enter '4' if you're building a Vista OS installation disc and '8' if you're building a Windows 7 OS installation disc.
7. Now we're ready to burn so click the big 'Build' button!
8. Assuming your source folder is in order (i.e. it contains a 'sources' folder with an 'install.wim' file in it) and depending on your current settings, the program will prompt to correct certain things so they match (as closely as possible) an official Microsoft disc/image.
Click 'Yes' to whatever it says needs correcting - these settings have been tried and tested so we know they work!
9. When prompted, give the disc a name and click the 'Yes' button.
10. You'll then be presented with one final 'information' screen before the program starts to burn the disc.
Double check everything looks roughly as it does below and then click 'OK'.
That's it!
