Tash,
Welcome to the Forums! 😀
As Terumo says, copy the i386 folder to one of your partitions.
Afterward, you need to edit the reistry as follows:
Navigate to "HKLM\software\microsoft\windows\current version" and locate the "source path" key.
Edit the key to point to the location of your i386 folder and you're done.
You will never be asked for the install disk again.