In Win98, if you want to get “Open with…” context menu, you will need to press left-shift and simultaneously right-click the file.
In WinXP, right-clicking will always show “Open With…” in the context menu. If you want to have this behavior in your Win98, then create a reg file that contains the following:
----------------------------------------------------------------
REGEDIT4
[HKEY_CLASSES_ROOT\*\Shell\Open With...\command]
@="rundll32.exe C:\\Windows\\system\\shell32.dll,OpenAs_RunDLL %1"
----------------------------------------------------------------
You can give it any name, such as OpenWith.reg.
Right-click that reg file you just created, then click “Merge” -> “Yes”.
You need to do one more step to avoid double “Open with…” for unknown files, i.e., you can either delete or rename following registry key:
[HKEY_CLASSES_ROOT\Unknown]
I would suggest to rename it maybe to “Unknown-“, so that you can revert back to the previous properties when you want.
One last note, if you want to do it, you do it at your own risk, I will not be responsible for any consequences. In my Win98SE it works fine though.