I'd like to do some light data processing - a little binary data manipulation followed by conversion to text serialization. The result is written to a file, and processed by an external program (run by my program). The data processing is more than I'd care to consider doing in batch files.

I'd prefer to use a scripting language, but not have to install the language first. The target computers are mostly older Windows boxes, which are disconnected from the network (no updates, such as PowerShell)

I'm not familiar with the various language's tools for creating EXE files. Which ones have solutions that work well and don't produce huge files? (i.e., whole interpreter package plus my script.)