Very strange problem

[WebSmasher]

When I try to copy a Securom >v 4.8 version (like 4.83 for ex.) I have a strange problem: like suggested by VLuka in his explanation, i make a .ccd image and I get the .mds with Alcohol, then i trasform that .mds in .bwa and I use Twinpeak to patch the image. The problem is that when I try to write that patched image, Alcohol tells me that the Lead-Out address in the TOC is different from the lenght of data. For example: in the TOC the LeadOut is 73.30 min, but the data is effectively 75.20 min. and so the burned cd doesn't work. Can you help me? Thx
P.S and sorry for the bad english