Hi I've a wise installer package. say for yahoo messenger. i use it thru svcpack.inf with the entry ymsgr8us.exe /s it works fine i need to make some changes to the actual setup. for this first i need to unpack the wise installer. what software i need to unpack it. also i need to repack it after making the necessary changes. can any one give me the direct links of both the softwares.

universal extractor it what you need to extract. it is here in these forums. search for it. as far repacking, you need wise installer professional which costs money. You can repack it using inno setup which is free but it wouldn't be a wise installer though.