No problem, I understand.
While here on the screen, highlight just the line in the note in bold by dragging your mouse over it holding down your left mouse button. Once completely highlighted, press your Control key and your C key together (That copies it into the buffer)
To paste it into the Dos window, select the dos window now then click on the top left corner to bring up the menu. You will see Edit, Paste. Just to be annoying, Microsoft did not make Control-V (Paste) work in the dos box :(
By the way, If you happen to get a message back about file not found, thats a different issue (The Install Shield directory is hidden, doing it from the dos prompt should bypass the hidden aspect, but Windows 98 ... ya never know). If this happens, I'll have you unhide the directory first (just another copy and paste)
ATTRIB -H "C:\Program Files\InstallShield Installation Information"