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I want to extract an InstallSHIELD's 5 install package and above is the list of files in "data1" folder. However there is no *.hdr files so I can't extact the CAB files using tools on Internet, even though the package is still able to be installed without any error. Can anybody give me a suggestion for this please?

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possible duplicate of How to extract an InstallShield Cabinet file? – bubu Jun 17 '11 at 4:34
I tried all the solution in the link you posted but none worked. And my question is about the case with missing file. – Teiv Jun 17 '11 at 4:44

For that, you need I5Comp. If it doesn’t work, try I3Comp, then finally IComp.

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Try UniExtract. It lists Installshield .cab in its list od suppored formats.

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