You could provide these files in a self-extraction EXE. Then you could either provide that EXE separately for the end-user to extract. Another idea is to create a ZIP file and a post-setup executable to run. Have the Post-Setup executable use DynaZip or some other 3rd party unzip utility to unzip the file to where you need it.

>I will not buy full Installshield even if it works.
>So I consider this question unnessecary.
>However, I need to make a setup disks from those 488 files. The number of
>files to distribute will change slightly, but frequently from distribution to distribution.
>How I can create a setup ?
>
>>OK, I can duplicate what you are observing. You do get a decaying performance curve as more files are added to a file folder. I even tried adding 50 files at a time to the same folder. The performance decline was the same regardless of how I tried to copy the files there. Post a new thread to those using the full version if InstallShield and ask if they see this same degradation in performance.