win7 boot disk wont boot after successful burn

[wudi]

used imgburn to overcome 2gb limit for udf files. after successfully burning dvd+rw disc it will not boot.  i couldnt disk copy as the source disk was multisession, then couldnt use udf in nero coz instal.wim greater than 2gb.  has it failed because it is now single session disk ie  session 2 is absent and was it relevant?

[LIGHTNING UK!]

Tell us more about the source disc. What files are on it?

 

Where's the log of the burn?