Search the log file for 'Error'. For instance you may find this if you do,
DEBUG: Error 2602: The File table entry 'ADSK_17FAC44C_813E_45DB_978F_E76AD8C4E63A' has no associated entry in the Media table.
MSI (s) (E8:F0) [23:59:07:745]: Product: AutoCAD 2010 - English -- Internal Error 2602. File, ADSK_17FAC44C_813E_45DB_978F_E76AD8C4E63A
You can google your errors listed in that log file to determine whether or not to recreate the deployment.
But since the deployment is no doubt bad, you should recreate it.
I have run into this exact same issue 'Error 2602'. I have re-created the dployment at least 6 times using two different machines and creating them in different locations but every time I try to do an install I get a 2602 error. I'm interested in the comment above about DirectX - anybody got more info about this?
In my case, there are no service packs or hot fixes applied but I do have additional files I'm trying to include - simple 2D block libraries. When the install fails and gives me the file code, it is always associated with the very first additional file (I know this as I have used Orca to have a look inside the msi with my mst applied to it).
Having had a look at what's going on inside Orca, I could see that my additional files were being allocated 'sequence' numbers for their installation but when I then looked at the media table there was no mention of any of these sequence numbers - obviously the cause of the " no associated entry in the Media table" message in the debug file.
After determining the range of sequence codes for my files I was able to edit the media table accordingly and then when I re-ran the installer it ran through without a hitch and I'm now sat looking at a full install of ACA2010 with my custom files alongside.
I was fortunate enough to be aware of the Orca application and thankfully have been able to resolve my problem - not the way I should have to go about things but at least it should only be a one-time task. Hope my findings are of use to some other people out there with similar problems.