Then it *IS* broke, and your boss needs to fix it!
Get a new license, install 2000 or XP, and use all the
libraries you want. There's *no* way to run DirectX 7 apps
on NT4 if they truly require the functionality, although
you could definitely compile and link them, you'd have to
find another box for testing and it'd have to have 98,
2000 or XP anyway.
The alternative is to not use DirectX. What did you want to
do, anyway? Just accelerated surfaces or real 3D work?