[felice2011]

...@gozarck ...In fact it is the same concept used in the utility "M&S Kompressor" and I think also in "UltraARC" by Razor.
If you want to split the archive already created in exact portions maintaining the same extension of the archives, with the possibility of changing file extension by joining the archives you can use this experimental.

The only downside for extracting using an installer must first join the splitted archives, and then install, and therefore requires a double size of the size of the extracted files to a temporary folder.