I'm reversing a dongle protected WISE installer, I have located the file to reverse and I have been able to reverse it using softice, the problem comes when I try to change the orginal file compiled in the installer with the one I have reversed, anyone know how to do it without having to rewrite the full installer?
Thank you in advance.

Search the usual tool sites, there are many programs to do this.

Yes, I know "Searching" is alien amonst most of you, but it does bring rewards

I have do it before with instalshield installers without problems cause there are tools to modify the cab files or lib files but WISE installers are packed in a single exe. (the only tools that I have found only unpack the contents, dont let you add or modify those files)
I finally could solve the problem downloading the trial version of wise package studio, adding the cracked file to generate an installer, and using the debug mode that comes with e_wise I could rip the packed file that I use to overwrite the packed exe in the original installer. Dirty, but worked fine. I had some extra problems cause the patched exe had diference size (bigger) than the original packed exe, so what I did was pack the cracked file with upx and I added extra data until I could make a file with the same file size. Really dirty, I know it, but now everything works fine.

It is quite difficult to replace files in a single file WISE installer, but there is no need - you can extract all the files, modify the ones you want, and still end up with a wise installation package. Only difference is that it'll be a multiple file distribution archive instead of a single one.

that's what winzip is for

You mean the self extractor?

I have read that WISE uses PK to compress the files in the installer, but taking a look to the compressed file I didn't found any PK/Zip signature so I decided to make an empty installer with the trial version of WISE with only the exe I had to include and then rip the compressed file from that installer and paste it to the installer I wanted to crack.
It worked fine this way but maybe somebody have a better solution to make it more polite.
Thanks to everybody for taking the time to help me. Really apreciated.