installer per user or tagged installation?

I am faced with a situation where I need to add a user ID to some installer at the server level. Ie, login and then get a signed installer to your bits.

I see two ways to do this, and was wondering about input.

a) build an installer for each bundle of content dynamically at the server level. (on linux, ming-gw cross compile per user bundle - server load issue).

b) tag the installer to fetch the unique bits, but that would require replacing strings in a compressed executable.

Any suggestions? Any other options?

Append a unique ID to the installer. That won't disturb the CRC check, won't require handling compressed data and will be readable by the installer itself.

How? Example?

How what? Reading a file? FileOpen, FileSeek, FileRead and FileClose. The wiki is filled with such examples, for instance:

There's even a complete example:

Thanks! FYI, I will be doing this from cmd line, web server and linux.... (pretty easy at this point, thank you very much from the heart of Texas)