Even this is possible (god I love bringing the good news), and the instructions are so easy, even a child could do it

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- Install D2Loader properly and make sure it works.
- Insert your Diablo II Expansion CD and close the AutoPlay
- Go to My Computer and explore the Diablo II CD
- Copy D2Xmusic.mpq and D2XVideo.mpq (dont rename them), and paste them in the Diablo II Directory with your D2Loader.
- Run the game without your Diablo II CD.
D2Loader first checks it directory for the 2 files, if they exist in the directory with it, it runs off these. If not, it goes to your CD and tries to retrieve them. Congrats, you just screwed over your CD with a copy command. You can then lend your CD to someone, or just keep it for a reinstall.
Note that D2Xmusic will not clash with MusicPatch, so its safe to use.
This can be done on any mod, but D2Loader may be detected by the Warden System running on Diablo II Battle.net and you may get banned for it.
It has been confirmed from Seltsamuel's unique programming, SnEj will NOT support D2Loader.