Is it possible to manually extract files from a self-extracting executable?

Question

Whether the program, but not the data, in the file is corrupt or if the self-extractor won't overwrite a same version installation. A file from said .exe is needed to use the installation because the latter's copy is corrupt. Full re-install isn't an option due to damaged discs.

Answer 1

winace archive program can do that almost

Answer 2

some of them can be opened by winzip

but you have to pay for it though

Answer 3

I don't think there's any easy way to accomplish that.